chore: [DNM] Release 1.2.0 RC1 bundle validation

[yihua]

Describe the issue this Pull Request addresses

Release 1.2.0 RC1 bundle validation (orgapachehudi-1176)

Summary and Changelog

Enable release candidate bundle validation workflow for 1.2.0-rc1 with staging repo 1176.

• Remove if: false guards from all validation jobs
• Update HUDI_VERSION to 1.2.0-rc1 and STAGING_REPO_NUM to 1176
• Add Spark 4.1 matrix entry to the Spark 4 validation job
• Add Flink 2.1 matrix entry to the Flink 2 validation job

Impact

RC1 bundle validation only; no user-facing changes.

Risk Level

none

Documentation Update

none

Contributor's checklist

• Read through contributor's guide
• Enough context is provided in the sections above
• Adequate tests were added if applicable

[hudi-agent]

🤖 This review was generated by an AI agent and may contain mistakes. Please verify any suggestions before applying.

Thanks for working on this! This PR enables RC1 bundle validation by removing if: false guards, bumping HUDI_VERSION/STAGING_REPO_NUM, adding Spark 4.1 and Flink 2.1 matrix entries, and updating the m1-mac profile's docker-compose file path. No issues flagged from this automated pass — a Hudi committer or PMC member can take it from here for a final review.

cc @yihua

[hudi-agent]

🤖 This review was generated by an AI agent and may contain mistakes. Please verify any suggestions before applying.

No reviewable code files in this PR.

cc @yihua

[hudi-agent]

🤖 This review was generated by an AI agent and may contain mistakes. Please verify any suggestions before applying.

No reviewable code files in this PR.

cc @yihua

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.12%. Comparing base (93bd78d) to head (8f688ef).

Additional details and impacted files

@@                 Coverage Diff                 @@
##             release-1.2.0   #18622      +/-   ##
===================================================
- Coverage            68.13%   68.12%   -0.02%     
+ Complexity           29189    29188       -1     
===================================================
  Files                 2527     2527              
  Lines               141495   141495              
  Branches             17576    17576              
===================================================
- Hits                 96405    96390      -15     
- Misses               37158    37174      +16     
+ Partials              7932     7931       -1     

Flag	Coverage Δ
common-and-other-modules	44.37% <ø> (-0.01%)	⬇️
hadoop-mr-java-client	44.89% <ø> (-0.07%)	⬇️
spark-client-hadoop-common	48.27% <ø> (-0.01%)	⬇️
spark-java-tests	49.01% <ø> (-0.03%)	⬇️
spark-scala-tests	44.82% <ø> (-0.01%)	⬇️
utilities	37.60% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.
see 13 files with indirect coverage changes

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[hudi-bot]

CI report:

• 8f688ef Azure: SUCCESS

Bot commands

@hudi-bot supports the following commands:

• @hudi-bot run azure re-run the last Azure build