beam_PostCommit_Python37 timing out

[damccorm]

Seems to get stuck in :sdks:python:test-suites:dataflow:py37:postCommitIT

10:03:30 Build timed out (after 100 minutes). Marking the build as aborted.

https://builds.apache.org/job/beam_PostCommit_Python37/lastCompletedBuild/consoleFull

possible culprits listed in changes for these PRs: https://builds.apache.org/job/beam_PostCommit_Python37/173/
https://builds.apache.org/job/beam_PostCommit_Python37/174/

Imported from Jira BEAM-8005. Original Jira may contain additional context.
Reported by: udim.

[damccorm]

Dupe of #20930