GA Migrations Python PostCommit Sharding Examples

[fernando-wizeline]

As part of the migration of Precommit and Postcommit Jobs from Jenkins to GA in self-hosted runners, this PR contains:

Migrated workflow job-postcommit-python-examples.yml

The migrated workflows were added to CI.md

DO NOT MERGE until the effort to use self-hosted runners is completed #22703

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• Update CHANGES.md with noteworthy changes.
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To check the build health, please visit https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md

GitHub Actions Tests Status (on master branch)

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

[codecov]

Codecov Report

Merging #23298 (322d331) into master (98589f2) will increase coverage by 0.02%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #23298 +/- ##
==========================================
+ Coverage 73.40% 73.42% +0.02% 
==========================================
Files 718 718 Lines 95620 95620 ==========================================
+ Hits 70188 70213 +25 + Misses 24121 24096 -25 
Partials 1311 1311 

Flag	Coverage Δ
python	83.20% <ø> (+0.03%)	⬆️

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see 12 files with indirect coverage changes

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[andoni-guzman]

LGTM!

[damccorm]

LGTM, thanks

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@beam.apache.org list. Thank you for your contributions.

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@beam.apache.org list. Thank you for your contributions.

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@beam.apache.org list. Thank you for your contributions.

[damccorm]

Closing as stale