*: (8.1) fix TSO retrieval failure during read TS validation

[ekexium]

What problem does this PR solve?

Issue Number: ref #59402

Problem Summary:

What changed and how does it work?

Do not set txn scope in snapshot to fix the problem.

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.

Fix TSO retrieval failure during read TS validation when `zone` label is set.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.1@5ac7f18). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.1     #59521   +/-   ##
================================================
  Coverage               ?   71.2102%           
================================================
  Files                  ?       1468           
  Lines                  ?     424019           
  Branches               ?          0           
================================================
  Hits                   ?     301945           
  Misses                 ?     101526           
  Partials               ?      20548           

Components	Coverage Δ
dumpling	52.9656% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	41.4273% <0.0000%> (?)

[ekexium]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cfzjywxk, MyonKeminta

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [MyonKeminta,cfzjywxk]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-02-17 08:07:47.27851265 +0000 UTC m=+862309.674734713: ☑️ agreed by MyonKeminta.
• 2025-02-19 07:50:15.260993429 +0000 UTC m=+1034057.657215491: ☑️ agreed by cfzjywxk.

[ekexium]

/retest

[ekexium]

/retest

[ekexium]

/retest