Automatic merge from submit-queue (batch tested with PRs 41357, 41178, 41280, 41184, 41278)

Add verify-gofmt as a Bazel test.

Also, moved `--flaky_test_attempts=3` out of `.bazelrc` since it was annoying. I think this verify-all pattern is working well in test-infra, we should try and make it happen here.

**Release note**:
```release-note
NONE
```