br/lightning: Apply pd_enable_follower_handle_region to Lightning/BR

[okJiang]

What problem does this PR solve?

Issue Number: close #58651

Problem Summary:

What changed and how does it work?

• Get pd_enable_follower_handle_region from TiDB and set it to pd client.

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 10.41667% with 43 lines in your changes missing coverage. Please review.

Project coverage is 73.6073%. Comparing base (db15d43) to head (f60913e).
Report is 10 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59783        +/-   ##
================================================
+ Coverage   72.9550%   73.6073%   +0.6523%     
================================================
  Files          1699       1729        +30     
  Lines        469293     479528     +10235     
================================================
+ Hits         342373     352968     +10595     
+ Misses       105847     104609      -1238     
- Partials      21073      21951       +878     

Flag	Coverage Δ
integration	45.6060% <11.3636%> (?)

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	45.0088% <0.0000%> (-0.0447%)	⬇️

[okJiang]

/test pull-br-integration-test

[tiprow]

@okJiang: The specified target(s) for /test were not found.
The following commands are available to trigger required jobs:

• /test fast_test_tiprow
• /test tidb_parser_test

Use /test all to run all jobs.

In response to this:

/test pull-br-integration-test

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[okJiang]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [YuJuncen,lance6716]
• br/OWNERS [YuJuncen]
• lightning/OWNERS [lance6716]
• pkg/lightning/OWNERS [lance6716]

Approvers can indicate their approval by writing /approve in a comment
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-02-27 07:33:53.915676015 +0000 UTC m=+513981.868834282: ☑️ agreed by YuJuncen.
• 2025-02-27 10:37:13.338091789 +0000 UTC m=+524981.291250055: ☑️ agreed by lance6716.

[okJiang]

/retest

[tiprow]

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

Test name	Commit	Details	Required	Rerun command
fast_test_tiprow	f60913e	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]

@okJiang: 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/build	f60913e	link	true	/test build
idc-jenkins-ci-tidb/unit-test	f60913e	link	true	/test unit-test
idc-jenkins-ci-tidb/check_dev_2	f60913e	link	true	/test check-dev2
pull-br-integration-test	f60913e	link	true	/test pull-br-integration-test

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.