statistics: trigger auto-analyze based on histogram row count (#24382)

[ti-srebot]

cherry-pick #24382 to release-5.0
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/26707

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

git push git@github.com:ti-srebot/tidb.git pr/26707:release-5.0-50ae2d8266b9

---

What problem does this PR solve?

Issue Number: close #24237, related to #26282

Problem Summary:

Trigger auto analyze in a more proper way.

What is changed and how it works?

What's Changed:

Use the histogram row count as the base count for checking auto analyze, instead of the Count in Table.

Related changes

N/A

Check List

Tests

• Unit test

Side effects

N/A

Release note

• Trigger auto-analyze based on histogram row count

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• qw4990
• time-and-fate

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[ti-chi-bot]

@ti-srebot: Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[ti-srebot]

/run-all-tests

[ti-srebot]

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

[time-and-fate]

/run-check_dev

[zhouqiang-cl]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: cdde806

[ti-chi-bot]

@ti-srebot: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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