ddl: fetch schemas in work pool in case of reporting a error in one goroutine.

[joccau]

What problem does this PR solve?

Issue Number: Ref #54436

Problem Summary:

• When fetchAllSchemasWithTables gets an error from one goroutine, other routines are not canceled.
• Use errgroup replace it.

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.

None

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 2 lines in your changes missing coverage. Please review.

Project coverage is 56.9829%. Comparing base (41c9926) to head (ba97c0b).
Report is 29 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #55841         +/-   ##
=================================================
- Coverage   72.8428%   56.9829%   -15.8600%     
=================================================
  Files          1598       1754        +156     
  Lines        444498     635245     +190747     
=================================================
+ Hits         323785     361981      +38196     
- Misses       100768     248318     +147550     
- Partials      19945      24946       +5001     

Flag	Coverage Δ
integration	39.4954% <42.3076%> (?)
unit	71.9614% <92.3076%> (+0.0087%)	⬆️

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

Components	Coverage Δ
dumpling	52.9567% <ø> (ø)
parser	∅ <ø> (∅)
br	62.8969% <ø> (+17.1236%)	⬆️

[D3Hunter]

rest lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, lance6716

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-05 05:34:27.373345085 +0000 UTC m=+508991.891398010: ☑️ agreed by lance6716.
• 2024-09-09 08:56:56.49355704 +0000 UTC m=+260286.233980974: ☑️ agreed by D3Hunter.