br: revert backup progress

[Leavrth]

What problem does this PR solve?

Issue Number: ref #53778

Problem Summary:
get region counts for each range takes too much time when there are 1 million tables.

What changed and how does it work?

revert back to use range unit progress

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

[tiprow]

Hi @Leavrth. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

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[codecov]

Codecov Report

Attention: Patch coverage is 78.66667% with 16 lines in your changes missing coverage. Please review.

Project coverage is 74.7724%. Comparing base (1fa2955) to head (1e70c44).
Report is 108 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #53914        +/-   ##
================================================
+ Coverage   73.1670%   74.7724%   +1.6054%     
================================================
  Files          1680       1696        +16     
  Lines        463042     480280     +17238     
================================================
+ Hits         338794     359117     +20323     
+ Misses       103444      99302      -4142     
- Partials      20804      21861      +1057     

Flag	Coverage Δ
integration	46.1490% <78.6666%> (?)
unit	72.4966% <32.0000%> (+0.1960%)	⬆️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	59.5911% <78.6666%> (+13.5712%)	⬆️

[BornChanger]

/retest

[tiprow]

@BornChanger: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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[YuJuncen]

rest lgtm

[ti-chi-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]

[LGTM Timeline notifier]

Timeline:

• 2024-12-23 03:10:37.884872556 +0000 UTC m=+1444827.973675096: ☑️ agreed by 3pointer.
• 2025-01-03 08:42:55.009077605 +0000 UTC m=+685510.365082147: ☑️ agreed by YuJuncen.

[Leavrth]

/ok-to-test

[tiprow]

@Leavrth: 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
tidb_parser_test	1e70c44	link	true	/test tidb_parser_test
fast_test_tiprow	1e70c44	link	true	/test fast_test_tiprow

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #58697.