gsutil: use depot_tools.gsutil_py_path instead of path['depot_tools']

scripts/slave/recipes/flutter/engine.expected/mac.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\nfrom common import chromium_utils # Error? See https://crbug.com/584783.\n\npath = sys.argv[1]\nif os.path.exists(path):\n  for p in (os.path.join(path, x) for x in os.listdir(path)):\n    if os.path.isdir(p):\n      chromium_utils.RemoveDirectory(p)\n    else:\n      os.unlink(p)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "rmcontents everything",
     "~followup_annotations": [
@@ skipping 204 matching lines @@
     },
     "name": "Zip darwin-x64 Artifacts",
     "stdin": "{\"entries\": [{\"archive_name\": \"sky_snapshot\", \"path\": \"[SLAVE_BUILD]/src/out/host_debug/sky_snapshot\", \"type\": \"file\"}, {\"archive_name\": \"sky_shell\", \"path\": \"[SLAVE_BUILD]/src/out/host_debug/sky_shell\", \"type\": \"file\"}, {\"archive_name\": \"icudtl.dat\", \"path\": \"[SLAVE_BUILD]/src/out/host_debug/icudtl.dat\", \"type\": \"file\"}], \"output\": \"[TMP_BASE]/tmp_tmp_1/artifacts.zip\", \"root\": \"[SLAVE_BUILD]/src\"}"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "[TMP_BASE]/tmp_tmp_1/artifacts.zip",
       "gs://flutter_infra/flutter/f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9/darwin-x64/artifacts.zip"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/dart-sdk/dart-sdk/bin:%(PATH)s"
     },
     "name": "gsutil upload \"darwin-x64/artifacts.zip\"",
     "~followup_annotations": [
@@ skipping 33 matching lines @@
     },
     "name": "Zip android-arm-profile Artifacts",
     "stdin": "{\"entries\": [{\"archive_name\": \"gen_snapshot\", \"path\": \"[SLAVE_BUILD]/src/out/android_profile/clang_i386/gen_snapshot\", \"type\": \"file\"}], \"output\": \"[TMP_BASE]/tmp_tmp_2/artifacts.zip\", \"root\": \"[SLAVE_BUILD]/src\"}"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "[TMP_BASE]/tmp_tmp_2/artifacts.zip",
       "gs://flutter_infra/flutter/f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9/android-arm-profile/darwin-x64.zip"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/dart-sdk/dart-sdk/bin:%(PATH)s"
     },
     "name": "gsutil upload \"android-arm-profile/darwin-x64.zip\"",
     "~followup_annotations": [
@@ skipping 33 matching lines @@
     },
     "name": "Zip android-arm-release Artifacts",
     "stdin": "{\"entries\": [{\"archive_name\": \"gen_snapshot\", \"path\": \"[SLAVE_BUILD]/src/out/android_release/clang_i386/gen_snapshot\", \"type\": \"file\"}], \"output\": \"[TMP_BASE]/tmp_tmp_3/artifacts.zip\", \"root\": \"[SLAVE_BUILD]/src\"}"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "[TMP_BASE]/tmp_tmp_3/artifacts.zip",
       "gs://flutter_infra/flutter/f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9/android-arm-release/darwin-x64.zip"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/dart-sdk/dart-sdk/bin:%(PATH)s"
     },
     "name": "gsutil upload \"android-arm-release/darwin-x64.zip\"",
     "~followup_annotations": [
@@ skipping 166 matching lines @@
     },
     "name": "Zip ios Artifacts",
     "stdin": "{\"entries\": [{\"archive_name\": \"dart_io_entries.txt\", \"path\": \"[SLAVE_BUILD]/src/dart/runtime/bin/dart_io_entries.txt\", \"type\": \"file\"}, {\"archive_name\": \"dart_vm_entry_points.txt\", \"path\": \"[SLAVE_BUILD]/src/sky/engine/bindings/dart_vm_entry_points.txt\", \"type\": \"file\"}, {\"archive_name\": \"snapshot.dart\", \"path\": \"[SLAVE_BUILD]/src/sky/engine/bindings/snapshot.dart\", \"type\": \"file\"}, {\"archive_name\": \"gen_snapshot\", \"path\": \"[SLAVE_BUILD]/src/out/ios_debug/clang_x64/gen_snapshot\", \"type\": \"file\"}, {\"archive_name\": \"Flutter.framework.zip\", \"path\": \"[SLAVE_BUILD]/src/out/debug/Flutter.framework.zip\", \"type\": \"file\"}, {\"archive_name\": \"FlutterXcode.zip\", \"path\": \"[SLAVE_BUILD]/src/out/debug/FlutterXcode.zip\", \"type\": \"file\"}], \"output\": \"[TMP_BASE]/tmp_tmp_4/artifacts.zip\", \"root\": \"[SLAVE_BUILD]/src\"}"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "[TMP_BASE]/tmp_tmp_4/artifacts.zip",
       "gs://flutter_infra/flutter/f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9/ios/artifacts.zip"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/dart-sdk/dart-sdk/bin:%(PATH)s"
     },
     "name": "gsutil upload \"ios/artifacts.zip\"",
     "~followup_annotations": [
@@ skipping 73 matching lines @@
     },
     "name": "Zip ios-profile Artifacts",
     "stdin": "{\"entries\": [{\"archive_name\": \"dart_io_entries.txt\", \"path\": \"[SLAVE_BUILD]/src/dart/runtime/bin/dart_io_entries.txt\", \"type\": \"file\"}, {\"archive_name\": \"dart_vm_entry_points.txt\", \"path\": \"[SLAVE_BUILD]/src/sky/engine/bindings/dart_vm_entry_points.txt\", \"type\": \"file\"}, {\"archive_name\": \"snapshot.dart\", \"path\": \"[SLAVE_BUILD]/src/sky/engine/bindings/snapshot.dart\", \"type\": \"file\"}, {\"archive_name\": \"gen_snapshot\", \"path\": \"[SLAVE_BUILD]/src/out/ios_profile/clang_x64/gen_snapshot\", \"type\": \"file\"}, {\"archive_name\": \"Flutter.framework.zip\", \"path\": \"[SLAVE_BUILD]/src/out/profile/Flutter.framework.zip\", \"type\": \"file\"}, {\"archive_name\": \"FlutterXcode.zip\", \"path\": \"[SLAVE_BUILD]/src/out/profile/FlutterXcode.zip\", \"type\": \"file\"}], \"output\": \"[TMP_BASE]/tmp_tmp_5/artifacts.zip\", \"root\": \"[SLAVE_BUILD]/src\"}"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "[TMP_BASE]/tmp_tmp_5/artifacts.zip",
       "gs://flutter_infra/flutter/f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9/ios-profile/artifacts.zip"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/dart-sdk/dart-sdk/bin:%(PATH)s"
     },
     "name": "gsutil upload \"ios-profile/artifacts.zip\"",
     "~followup_annotations": [
@@ skipping 73 matching lines @@
     },
     "name": "Zip ios-release Artifacts",
     "stdin": "{\"entries\": [{\"archive_name\": \"dart_io_entries.txt\", \"path\": \"[SLAVE_BUILD]/src/dart/runtime/bin/dart_io_entries.txt\", \"type\": \"file\"}, {\"archive_name\": \"dart_vm_entry_points.txt\", \"path\": \"[SLAVE_BUILD]/src/sky/engine/bindings/dart_vm_entry_points.txt\", \"type\": \"file\"}, {\"archive_name\": \"snapshot.dart\", \"path\": \"[SLAVE_BUILD]/src/sky/engine/bindings/snapshot.dart\", \"type\": \"file\"}, {\"archive_name\": \"gen_snapshot\", \"path\": \"[SLAVE_BUILD]/src/out/ios_release/clang_x64/gen_snapshot\", \"type\": \"file\"}, {\"archive_name\": \"Flutter.framework.zip\", \"path\": \"[SLAVE_BUILD]/src/out/release/Flutter.framework.zip\", \"type\": \"file\"}, {\"archive_name\": \"FlutterXcode.zip\", \"path\": \"[SLAVE_BUILD]/src/out/release/FlutterXcode.zip\", \"type\": \"file\"}], \"output\": \"[TMP_BASE]/tmp_tmp_6/artifacts.zip\", \"root\": \"[SLAVE_BUILD]/src\"}"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "[TMP_BASE]/tmp_tmp_6/artifacts.zip",
       "gs://flutter_infra/flutter/f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9/ios-release/artifacts.zip"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/dart-sdk/dart-sdk/bin:%(PATH)s"
     },
     "name": "gsutil upload \"ios-release/artifacts.zip\"",
     "~followup_annotations": [
@@ skipping 21 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  chromium_utils.RemoveDirectory(sys.argv[1])@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]