executor: Add session variable for hash join v2

[windtalker]

What problem does this PR solve?

Issue Number: ref #53127

Problem Summary:

This pr add a session variable for hash join v2, and set the to false by default.

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

[tiprow]

Hi @windtalker. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.7628%. Comparing base (312ed79) to head (d5baf62).
Report is 10 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #56023        +/-   ##
================================================
+ Coverage   73.4734%   75.7628%   +2.2893%     
================================================
  Files          1600       1601         +1     
  Lines        443771     446546      +2775     
================================================
+ Hits         326054     338316     +12262     
+ Misses        97744      87931      -9813     
- Partials      19973      20299       +326     

Flag	Coverage Δ
integration	49.3835% <56.2500%> (?)
unit	72.8266% <100.0000%> (+0.2914%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	53.1514% <ø> (+0.1947%)	⬆️
parser	∅ <ø> (∅)
br	52.9878% <ø> (+7.1218%)	⬆️

[xzhangxian1008]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-14 06:05:02.097138529 +0000 UTC m=+681971.837562462: ☑️ agreed by XuHuaiyu.
• 2024-09-23 06:16:19.588003802 +0000 UTC m=+1460249.328427741: ☑️ agreed by xzhangxian1008.

[yudongusa]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: XuHuaiyu, xzhangxian1008, yudongusa

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Needs approval from an approver in each of these files:

• OWNERS [XuHuaiyu]
• pkg/sessionctx/variable/OWNERS [yudongusa]

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