[infra] Trim down isolate for recipe bundle

Change-Id: Ic6da2d71b4e45fe67bc32942a87d41426bc9d05b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/224189
Reviewed-by: Ben Wagner aka dogben <benjaminwagner@google.com>
Commit-Queue: Eric Boren <borenet@google.com>

infra/bots/gen_tasks.go

@@ -720,7 +720,7 @@ func bundleRecipes(b *specs.TasksCfgBuilder) string {
 			"PATH": []string{"cipd_bin_packages", "cipd_bin_packages/bin"},
 		},
 		Idempotent: true,
-		Isolate:    relpath("swarm_recipe.isolate"),
+		Isolate:    relpath("recipes.isolate"),
 	})
 	return BUNDLE_RECIPES_NAME
 }

infra/bots/recipes.isolate

@@ -0,0 +1,12 @@
+{
+  'variables': {
+    'files': [
+      '../../../.gclient',
+      '../config/recipes.cfg',
+      'bundle_recipes.sh',
+      'recipe_modules/',
+      'recipes/',
+      'recipes.py',
+    ],
+  },
+}

infra/bots/tasks.json

@@ -22922,7 +22922,7 @@
         ]
       },
       "idempotent": true,
-      "isolate": "swarm_recipe.isolate"
+      "isolate": "recipes.isolate"
     },
     "Housekeeper-PerCommit-CheckGeneratedFiles": {
       "caches": [