The PostCommit Python Xlang Gcp Direct job is flaky

[github-actions[bot]]

The PostCommit Python Xlang Gcp Direct is failing over 50% of the time. Please visit https://github.com/apache/beam/actions/workflows/beam_PostCommit_Python_Xlang_Gcp_Direct.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=2&var-Workflow=PostCommit%20Python%20Xlang%20Gcp%20Direct