[CT] Use zips of SKPs to speed up "isolate tests" in recipes

scripts/slave/recipes/skia/ct_skps.expected/CT_DM_1m_SKPs.json

Index: scripts/slave/recipes/skia/ct_skps.expected/CT_DM_1m_SKPs.json
diff --git a/scripts/slave/recipes/skia/ct_skps.expected/CT_DM_1m_SKPs.json b/scripts/slave/recipes/skia/ct_skps.expected/CT_DM_1m_SKPs.json
index ef29e46d4509437b9caad023b19503ddc4960ac3..4e4d1470eaf8b9f1b977a41300b5ef42396bccb8 100644
--- a/scripts/slave/recipes/skia/ct_skps.expected/CT_DM_1m_SKPs.json
+++ b/scripts/slave/recipes/skia/ct_skps.expected/CT_DM_1m_SKPs.json
@@ -245,6 +245,16 @@
     "cmd": [
       "python",
       "-u",
+      "RECIPE_MODULE[build::zip]/resources/zip.py"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "zip skps dir",
+    "stdin": "{\"entries\": [{\"path\": \"[SLAVE_BUILD]/skps/slave1\", \"type\": \"dir\"}], \"output\": \"[SLAVE_BUILD]/skps/slave1.zip\", \"root\": \"[SLAVE_BUILD]/skps/slave1\", \"use_python_zip\": false}"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[SLAVE_BUILD]/swarming_temp_dir",
       "511"
@@ -320,6 +330,16 @@
     "cmd": [
       "python",
       "-u",
+      "RECIPE_MODULE[build::zip]/resources/zip.py"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "zip skps dir (2)",
+    "stdin": "{\"entries\": [{\"path\": \"[SLAVE_BUILD]/skps/slave2\", \"type\": \"dir\"}], \"output\": \"[SLAVE_BUILD]/skps/slave2.zip\", \"root\": \"[SLAVE_BUILD]/skps/slave2\", \"use_python_zip\": false}"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[SLAVE_BUILD]/swarming_temp_dir",
       "511"
@@ -395,6 +415,16 @@
     "cmd": [
       "python",
       "-u",
+      "RECIPE_MODULE[build::zip]/resources/zip.py"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "zip skps dir (3)",
+    "stdin": "{\"entries\": [{\"path\": \"[SLAVE_BUILD]/skps/slave3\", \"type\": \"dir\"}], \"output\": \"[SLAVE_BUILD]/skps/slave3.zip\", \"root\": \"[SLAVE_BUILD]/skps/slave3\", \"use_python_zip\": false}"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[SLAVE_BUILD]/swarming_temp_dir",
       "511"
@@ -470,6 +500,16 @@
     "cmd": [
       "python",
       "-u",
+      "RECIPE_MODULE[build::zip]/resources/zip.py"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "zip skps dir (4)",
+    "stdin": "{\"entries\": [{\"path\": \"[SLAVE_BUILD]/skps/slave4\", \"type\": \"dir\"}], \"output\": \"[SLAVE_BUILD]/skps/slave4.zip\", \"root\": \"[SLAVE_BUILD]/skps/slave4\", \"use_python_zip\": false}"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[SLAVE_BUILD]/swarming_temp_dir",
       "511"
@@ -545,6 +585,16 @@
     "cmd": [
       "python",
       "-u",
+      "RECIPE_MODULE[build::zip]/resources/zip.py"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "zip skps dir (5)",
+    "stdin": "{\"entries\": [{\"path\": \"[SLAVE_BUILD]/skps/slave5\", \"type\": \"dir\"}], \"output\": \"[SLAVE_BUILD]/skps/slave5.zip\", \"root\": \"[SLAVE_BUILD]/skps/slave5\", \"use_python_zip\": false}"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[SLAVE_BUILD]/swarming_temp_dir",
       "511"