planner: fix the unstable test TestAnalyzeGlobalStatsWithOpts (#34150)

[ti-srebot]

cherry-pick #34150 to release-6.0
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/34151

After apply modifications, you can push your change to this PR via:

git push [email protected]:ti-srebot/tidb.git pr/34151:release-6.0-5ba2adb5cb9d

---

What problem does this PR solve?

Issue Number: close #30929

Problem Summary: planner: fix the unstable test TestAnalyzeGlobalStatsWithOpts

What is changed and how it works?

planner: fix the unstable test TestAnalyzeGlobalStatsWithOpts

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

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

[ti-chi-bot]

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[ti-srebot]

/run-all-tests

[ti-srebot]

@qw4990 you're already a collaborator in bot's repo.

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/9e72b08b4b3c5abe75f45da56e9f316213038a20

[xhebox]

closed for DMR version