session: reserve bootstrap versions for v8.1.x

[glorv]

What problem does this PR solve?

Issue Number: close #54267, ref #53440

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

[tiprow]

Hi @glorv. Thanks for your PR.

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-06-27 03:06:59.133481079 +0000 UTC m=+861745.618969908: ☑️ agreed by D3Hunter.
• 2024-06-27 03:20:01.310815997 +0000 UTC m=+862527.796304829: ☑️ agreed by Leavrth.

[tiprow]

@glorv: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
fast_test_tiprow	b7fadfb	link	true	/test fast_test_tiprow

Full PR test history. Your PR dashboard.

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[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 56.5061%. Comparing base (686bb2f) to head (3278cf6).
Report is 15 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #54266         +/-   ##
=================================================
- Coverage   72.8764%   56.5061%   -16.3704%     
=================================================
  Files          1522       1643        +121     
  Lines        435482     611365     +175883     
=================================================
+ Hits         317364     345459      +28095     
- Misses        98579     242317     +143738     
- Partials      19539      23589       +4050     

Flag	Coverage Δ
integration	37.8870% <0.0000%> (?)
unit	71.8124% <50.0000%> (-0.0760%)	⬇️

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

Components	Coverage Δ
dumpling	52.9656% <ø> (ø)
parser	∅ <ø> (∅)
br	59.9294% <ø> (+13.7676%)	⬆️

[easonn7]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, easonn7, Leavrth

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Needs approval from an approver in each of these files:

• OWNERS [D3Hunter,Leavrth]
• br/OWNERS [Leavrth]
• pkg/session/OWNERS [easonn7]

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.2: #54272.