Bug 1774977 - Migrate Linux awsy from AWS to GCP r=ahal,jmaher

Differential Revision: https://phabricator.services.mozilla.com/D149704

taskcluster/ci/test/awsy.yml

@@ -5,6 +5,10 @@
 job-defaults:
     suite: awsy
     max-run-time: 7200
+    worker-type:
+        by-test-platform:
+            linux.*: t-linux-xlarge-gcp
+            default: default
     instance-size: xlarge
     virtualization:
         by-test-platform: