*: supports setting global/meta range placement policy

[nolouch]

What problem does this PR solve?

Issue Number: close #29677 ref #45384

Problem Summary:

What is changed and how it works?

unify the entry of placement rule to tidb. supports setting global/meta range placement policy by tidb. Example:

// policy about 5 replicas
create placement policy `mypolicy` FOLLOWERS=4;

// set global range to 5 replicas
ALTER RANGE global PLACEMENT POLICY mypolicy
// set meta range to 5 replicas
ALTER RANGE meta PLACEMENT POLICY mypolicy
// remove and reset to default
ALTER RANGE global PLACEMENT POLICY default

Check List

Tests

• Unit test
• Integration test
• Manual test

step 1:

step 2

Step 3

Step 4

Documentation

• Affects user behaviors

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

*: supports setting global/meta range placement policy

[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[tiprow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[codecov]

Codecov Report

Merging #47561 (fbff1b0) into master (97c7741) will increase coverage by 0.7422%.
Report is 40 commits behind head on master.
The diff coverage is 55.0724%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #47561        +/-   ##
================================================
+ Coverage   72.1482%   72.8904%   +0.7422%     
================================================
  Files          1353       1375        +22     
  Lines        401307     408587      +7280     
================================================
+ Hits         289536     297821      +8285     
+ Misses        92469      91991       -478     
+ Partials      19302      18775       -527     

Flag	Coverage Δ
integration	40.8122% <8.1300%> (?)
unit	72.0507% <53.6231%> (-0.0976%)	⬇️

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

Components	Coverage Δ
dumpling	53.9913% <ø> (ø)
parser	84.7222% <60.0000%> (+0.0253%)	⬆️
br	48.9944% <ø> (-4.2010%)	⬇️

[nolouch]

/retest-required

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/retest-required

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/retest-require

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/retest-require

[nolouch]

ptal @xhebox @lcwangchao

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-10-12 13:45:36.84813375 +0000 UTC m=+1319134.435243897: ☑️ agreed by CabinfeverB.
• 2023-10-13 04:10:40.721096619 +0000 UTC m=+1371038.308206758: ☑️ agreed by xhebox.

[nolouch]

/retest-required

[easonn7]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CabinfeverB, easonn7, xhebox

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[nolouch]

/retest-required

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/retest-required