The build_release_candidate job is flaky

[github-actions]

The build_release_candidate is failing over 50% of the time.
Please visit https://github.com/apache/beam/actions/workflows/build_release_candidate.yml?query=is%3Afailure+branch%3Amaster to see all failed workflow runs.
See also Grafana statistics: http://metrics.beam.apache.org/d/CTYdoxP4z/ga-post-commits-status?orgId=1&viewPanel=11&var-Workflow=build_release_candidate

[damccorm]

This is consistently worked on and fixed each time, so we don't really need to do anything here

[github-actions]

Reopening since the workflow is still flaky