br: remove evict slow store scheduler

[Leavrth]

What problem does this PR solve?

Issue Number: close #50566

Problem Summary:
one tikv has no leader and slow down br restore spee

What changed and how does it work?

remove evict-slow-store-scheduler when restore

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.

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[codecov]

Codecov Report

Merging #50776 (e51cc55) into master (dc54d6c) will increase coverage by 2.2582%.
Report is 80 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #50776        +/-   ##
================================================
+ Coverage   70.4854%   72.7436%   +2.2582%     
================================================
  Files          1463       1463                
  Lines        433206     434570      +1364     
================================================
+ Hits         305347     316122     +10775     
+ Misses       108609      98494     -10115     
- Partials      19250      19954       +704     

Flag	Coverage Δ
integration	48.9214% <ø> (?)
unit	70.2936% <ø> (+0.0193%)	⬆️

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

Components	Coverage Δ
dumpling	54.2940% <ø> (ø)
parser	∅ <ø> (∅)
br	51.1999% <ø> (+5.4792%)	⬆️

[3pointer]

LGTM, but what if PD add new scheduler in future?

[Leavrth]

PD hasn't the list of all the scheduler.

[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:

• 2024-02-04 08:58:43.337235835 +0000 UTC m=+88048.904005711: ☑️ agreed by 3pointer.
• 2024-02-07 03:08:14.889026954 +0000 UTC m=+326220.455796843: ☑️ agreed by YuJuncen.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #51043.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #51353.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #53878.