session: reset CTEStorageMap before txn conflict and retry() (#49399)

[ti-chi-bot]

This is an automated cherry-pick of #49399

What problem does this PR solve?

Issue Number: close #46522

Problem Summary:

sctx.CTEStorageMap was set to nil in finishStmt, the code may call retry() in doCommitWithRetry() and rebuild the statement, during the rebuild process, sctx.CTEStorageMap type assertion fail.

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

❗ No coverage uploaded for pull request base (release-6.5@d704323). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-6.5     #49444   +/-   ##
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  Coverage               ?   73.6989%           
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  Files                  ?       1087           
  Lines                  ?     349583           
  Branches               ?          0           
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  Hits                   ?     257639           
  Misses                 ?      75420           
  Partials               ?      16524           

[bb7133]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bb7133, jackysp

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• OWNERS [bb7133,jackysp]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-20 12:00:44.20038117 +0000 UTC m=+1048735.237608096: ☑️ agreed by jackysp.
• 2023-12-20 17:50:19.290727339 +0000 UTC m=+1069710.327954260: ☑️ agreed by bb7133.

[lcwangchao]

/retest