build: fix bazel running out of memory for "publish_snapshots" (#14849)

Due to a bug within Bazel, we need to increase the resource class for the CircleCI jobs that use Bazel. This can be lowered once we run everything with RBE; but for now we need it to get our CI green.

Author: devversion

.circleci/config.yml

@@ -282,6 +282,7 @@ jobs:
   # ----------------------------------------
   publish_snapshots:
     <<: *job_defaults
+    resource_class: xlarge
     steps:
       - *checkout_code
       - *restore_cache