meta: Add a GetDBMeta function to meta. (#53684)

[ti-chi-bot]

This is an automated cherry-pick of #53684

What problem does this PR solve?

Issue Number: close #53685

Problem Summary:

What changed and how does it work?

Add a function named GetDBMeta to meta.go. This function will allow the caller to get all raw tableInfos of database.

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.

  Covered by the existing unit test cases.

Side effects

Documentation

Release note

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

None

[asddongmen]

/retest

[codecov]

Codecov Report

Attention: Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-7.5@8e3a55e). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.5     #53780   +/-   ##
================================================
  Coverage               ?   72.0147%           
================================================
  Files                  ?       1412           
  Lines                  ?     411341           
  Branches               ?          0           
================================================
  Hits                   ?     296226           
  Misses                 ?      95224           
  Partials               ?      19891           

Flag	Coverage Δ
unit	72.0147% <62.5000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	53.9913% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.4920% <0.0000%> (?)

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-07-18 02:03:36.572800828 +0000 UTC m=+492238.563742290: ☑️ agreed by asddongmen.
• 2024-07-18 02:55:24.777529371 +0000 UTC m=+495346.768470841: ☑️ agreed by lance6716.

[GMHDBJD]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: asddongmen, GMHDBJD, lance6716

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• pkg/meta/OWNERS [GMHDBJD]

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[hawkingrei]

/retest