session: set EnableWindowFunction for all SessionVars (#55991)

[winoros]

Manually cherry-pick #55991

What problem does this PR solve?

Issue Number: ref #55981

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-7.1@b8cfb3e). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.1     #55993   +/-   ##
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  Coverage               ?   73.4521%           
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  Files                  ?       1211           
  Lines                  ?     380509           
  Branches               ?          0           
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  Hits                   ?     279492           
  Misses                 ?      83168           
  Partials               ?      17849           

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, qw4990

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-10 16:29:47.054661665 +0000 UTC m=+373856.795085599: ☑️ agreed by qw4990.
• 2024-09-11 01:22:03.968711304 +0000 UTC m=+405793.709135244: ☑️ agreed by hawkingrei.