[BEAM-12765] Revert "Merge pull request #15237 from [BEAM-12669] Fix issue with up…

[pabloem]

…date schema source format "

This reverts commit 9ce826e, reversing
changes made to b20a42e.

Please add a meaningful description for your change here

---

Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily:

• Choose reviewer(s) and mention them in a comment (R: @username).
• Format the pull request title like [BEAM-XXX] Fixes bug in ApproximateQuantiles, where you replace BEAM-XXX with the appropriate JIRA issue, if applicable. This will automatically link the pull request to the issue.
• Update CHANGES.md with noteworthy changes.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

See the Contributor Guide for more tips on how to make review process smoother.

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.

[pabloem]

Run Python 3.8 PostCommit

[pabloem]

r: @lukecwik
cc: @satybald - I'll re-revert this once we merge and make sure it can be admitted in

[pabloem]

Run Python PreCommit

[pabloem]

Run Python 3.8 PostCommit

[codecov]

Codecov Report

Merging #15337 (9e3db24) into master (af59192) will decrease coverage by 0.00%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master   #15337      +/-   ##
==========================================
- Coverage   83.81%   83.81%   -0.01%     
==========================================
  Files         441      441              
  Lines       59773    59770       -3     
==========================================
- Hits        50101    50094       -7     
- Misses       9672     9676       +4     

Impacted Files	Coverage Δ
...s/python/apache_beam/io/gcp/bigquery_file_loads.py	87.50% <50.00%> (-0.09%)	⬇️
sdks/python/apache_beam/utils/interactive_utils.py	87.80% <0.00%> (-2.44%)	⬇️
sdks/python/apache_beam/internal/metrics/metric.py	90.42% <0.00%> (-1.07%)	⬇️
sdks/python/apache_beam/io/localfilesystem.py	91.47% <0.00%> (-0.78%)	⬇️
...nners/portability/fn_api_runner/worker_handlers.py	79.44% <0.00%> (-0.35%)	⬇️
...ks/python/apache_beam/runners/worker/sdk_worker.py	88.85% <0.00%> (-0.16%)	⬇️
sdks/python/apache_beam/runners/common.py	88.73% <0.00%> (-0.15%)	⬇️
sdks/python/apache_beam/io/source_test_utils.py	89.86% <0.00%> (+1.38%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ecb8cbb...9e3db24. Read the comment docs.

[pabloem]

Run Python 3.8 PostCommit

[satybald]

@pabloem before you revert, commit, might I have a review for PR to fix the test?

#15352