br: adjust file directory `br/pkg/restore`

[Leavrth]

What problem does this PR solve?

Issue Number: ref #52877

Problem Summary: Adjust the file directory structure

What changed and how does it work?

Adjust the file directory structure br/pkg/restore. Just move the functions and structs.

Check List

Tests

• [x] Unit test
• [x] 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

[tiprow[bot]]

Hi @Leavrth. Thanks for your PR.

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 71.52778% with 246 lines in your changes are missing coverage. Please review.

Project coverage is 56.0424%. Comparing base (c60f97d) to head (aab524e). Report is 1 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #52944        +/-   ##
================================================
- Coverage   57.7692%   56.0424%   -1.7268%     
================================================
  Files          1409       1617       +208     
  Lines        396668     600964    +204296     
================================================
+ Hits         229152     336795    +107643     
- Misses       150078     240748     +90670     
- Partials      17438      23421      +5983     

Flag	Coverage Δ
integration	37.9065% <42.8240%> (?)
unit	71.2331% <55.6713%> (+14.6975%)	:arrow_up:

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

Components	Coverage Δ
dumpling	53.9957% <ø> (∅)
parser	∅ <ø> (∅)
br	56.5537% <71.5277%> (+55.9080%)	:arrow_up:

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 3pointer, YuJuncen

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Needs approval from an approver in each of these files:

• ~~br/OWNERS~~ [3pointer,YuJuncen]

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[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-04-29 09:26:31.863205377 +0000 UTC m=+262945.620340951: :ballot_box_with_check: agreed by 3pointer.
• 2024-04-30 05:39:05.165606161 +0000 UTC m=+335698.922741734: :ballot_box_with_check: agreed by YuJuncen.

[Leavrth]

/ok-to-test

[Leavrth]

/retest