[v10.0.x] : ImagePullSecrets: Add GAR secret to image_pull_secret in .drone.yml (#80916)

`ImagePullSecrets`: Add `GAR` secret to `image_pull_secret` in `.drone.yml` (#80912)

* Add GAR secret to image_pull_secret

* Fix starlark fmt

(cherry picked from commit 65104a7efa)

scripts/drone/utils/utils.star

@@ -6,7 +6,11 @@ load(
     "scripts/drone/steps/lib.star",
     "slack_step",
 )
-load("scripts/drone/vault.star", "pull_secret")
+load(
+    "scripts/drone/vault.star",
+    "gar_pull_secret",
+    "gcr_pull_secret",
+)
 
 failure_template = "Build {{build.number}} failed for commit: <https://github.com/{{repo.owner}}/{{repo.name}}/commit/{{build.commit}}|{{ truncate build.commit 8 }}>: {{build.link}}\nBranch: <https://github.com/{{ repo.owner }}/{{ repo.name }}/commits/{{ build.branch }}|{{ build.branch }}>\nAuthor: {{build.author}}"
 
@@ -83,7 +87,7 @@ def pipeline(
             },
         ],
         "depends_on": depends_on,
-        "image_pull_secrets": [pull_secret],
+        "image_pull_secrets": [gcr_pull_secret, gar_pull_secret],
     }
     if environment:
         pipeline.update(