Reland of depot_tools: add infra_paths recipe module for infra-specific paths

recipe_modules/git/example.expected/count-objects_with_bad_output_fails_build.json

Index: recipe_modules/git/example.expected/count-objects_with_bad_output_fails_build.json
diff --git a/recipe_modules/git/example.expected/count-objects_with_bad_output_fails_build.json b/recipe_modules/git/example.expected/count-objects_with_bad_output_fails_build.json
index d044d15e5f4b0730f0a82c57fec7f8721716605a..9df1d303cd63f2b4ecad025f4ca07314ca82c891 100644
--- a/recipe_modules/git/example.expected/count-objects_with_bad_output_fails_build.json
+++ b/recipe_modules/git/example.expected/count-objects_with_bad_output_fails_build.json
@@ -5,11 +5,10 @@
       "-u",
       "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
       "--path",
-      "[SLAVE_BUILD]/src",
+      "[CWD]/src",
       "--url",
       "https://chromium.googlesource.com/chromium/src.git"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "git setup"
   },
   {
@@ -21,7 +20,7 @@
       "master",
       "--recurse-submodules"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[CWD]/src",
     "name": "git fetch"
   },
   {
@@ -31,7 +30,7 @@
       "-f",
       "FETCH_HEAD"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[CWD]/src",
     "name": "git checkout"
   },
   {
@@ -40,7 +39,7 @@
       "rev-parse",
       "HEAD"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[CWD]/src",
     "name": "read revision",
     "stdout": "/path/to/tmp/",
     "~followup_annotations": [
@@ -55,7 +54,7 @@
       "-d",
       "-x"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[CWD]/src",
     "name": "git clean"
   },
   {
@@ -64,7 +63,7 @@
       "submodule",
       "sync"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[CWD]/src",
     "name": "submodule sync"
   },
   {
@@ -75,7 +74,7 @@
       "--init",
       "--recursive"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[CWD]/src",
     "name": "submodule update"
   },
   {
@@ -86,7 +85,7 @@
       "count-objects",
       "-v"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[CWD]/src",
     "name": "count-objects",
     "stdout": "/path/to/tmp/",
     "~followup_annotations": [