Bug 1795042 - [ci] Migrate 'l10n-cross-channel' tasks from AWS -> GCP, r=MasterWayZ,releng-reviewers,gbrown

Depends on D163603

Differential Revision: https://phabricator.services.mozilla.com/D163604

taskcluster/ci/l10n-cross-channel/kind.yml

@@ -13,7 +13,7 @@ jobs:
     quarantine:
         description: Push strings from all shipping trains to the quarantine strings repo
         run-on-projects: []
-        worker-type: b-linux
+        worker-type: b-linux-gcp
         ssh-key-secret:
             by-level:
                 "3": project/releng/gecko/build/level-3/l10n-cross-channel-quarantine-ssh