statistics: Do not refresh the modification time if only update for one table

[Rustin170506]

What problem does this PR solve?

Issue Number: close #55803
Problem Summary:

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.

修复 information_schema.tables 内存表信息不准确的问题
Fix the issue of inaccurate memory table information in `information_schema.tables`

[ti-chi-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.9549%. Comparing base (fd38012) to head (201f689).
Report is 36 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #56287        +/-   ##
================================================
+ Coverage   73.4525%   74.9549%   +1.5023%     
================================================
  Files          1605       1627        +22     
  Lines        444823     454932     +10109     
================================================
+ Hits         326734     340994     +14260     
+ Misses        98037      92702      -5335     
- Partials      20052      21236      +1184     

Flag	Coverage Δ
integration	31.0156% <ø> (?)
unit	72.5100% <ø> (-0.0336%)	⬇️

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Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	52.8928% <ø> (+6.8752%)	⬆️

[ti-chi-bot]

@Rustin170506: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/check_dev	201f689	link	true	/test check-dev
idc-jenkins-ci-tidb/check_dev_2	201f689	link	true	/test check-dev2

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