execution: commit the transaction before responding explain analyze results to the client (#38044)

[ti-srebot]

cherry-pick #38044 to release-5.0
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git pr https://github.com/pingcap/tidb/pull/38056

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---

What problem does this PR solve?

Issue Number: close #37373

Problem Summary:
The explain analyze statement execution with DML executors may respond to the client before the transaction commit finishing.

What is changed and how it works?

Trigger the commit operation if the statement is an explain analyze statement with DML executors before returning the record set of itself.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  • Sleep before the commit
  • Execute explain analyze
  • Check if it responses before the commit has finished
• No code

Side effects

Documentation

Release note

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

Fix the issue explain analyze with DML executors may respond to the client before the transaction commit has finished.

[ti-chi-bot]

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[ti-chi-bot]

@ti-srebot: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

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[ti-srebot]

/run-all-tests

[ti-srebot]

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[VelocityLight]

This pull request is closed because it's related version has closed automatic cherry-picking.
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