[BEAM-12324] TranslationsTest.test_run_packable_combine_* failing on PostCommit_Py_VR_Dataflow

[ihji]

cherry-pick BEAM-12321

Please add a meaningful description for your change here

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ValidatesRunner compliance status (on master branch)

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---			---		---
Java
Python	---			---		---
XLang				---		---

Examples testing status on various runners

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---	---	---	---	---	---	---
Java	---		---	---	---	---	---
Python	---	---	---	---	---	---	---
XLang	---	---	---	---	---	---	---

Post-Commit SDK/Transform Integration Tests Status (on master branch)

Go	Java	Python

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website	Whitespace	Typescript
Non-portable
Portable	---			---	---	---

See .test-infra/jenkins/README for trigger phrase, status and link of all Jenkins jobs.

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI.

[ihji]

Run Python Dataflow ValidatesRunner

[codecov]

Codecov Report

Merging #14798 (806d542) into master (51b37d8) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #14798   +/-   ##
=======================================
  Coverage   83.78%   83.79%           
=======================================
  Files         439      439           
  Lines       59118    59118           
=======================================
+ Hits        49534    49539    +5     
+ Misses       9584     9579    -5     

Impacted Files	Coverage Δ
...amples/snippets/transforms/aggregation/distinct.py
...n/apache_beam/examples/complete/game/user_score.py
...d/srcs/sdks/python/apache_beam/runners/__init__.py
...apache_beam/examples/cookbook/custom_ptransform.py
...cp/internal/clients/storage/storage_v1_messages.py
...ache_beam/runners/dataflow/ptransform_overrides.py
...build/srcs/sdks/python/apache_beam/io/snowflake.py
...rcs/sdks/python/apache_beam/testing/test_stream.py
...beam/testing/load_tests/load_test_metrics_utils.py
...srcs/sdks/python/apache_beam/io/localfilesystem.py
... and 868 more

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[ihji]

R: @yifanmai

[yifanmai]

Thanks again!