GC safe point v2 support global service safe point

[ystaticy]

What problem does this PR solve?

Issue Number: ref #6852

What is changed and how does it work?

GC safe point v2 support global service safe point

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has the configuration change
• Has HTTP API interfaces changed (Don't forget to add the declarative for the new API)
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• PR to update pingcap/tiup:
• Need to cherry-pick to the release branch

Release note

GC safe point v2 support global service safe point

[ti-chi-bot]

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[ti-chi-bot]

Hi @ystaticy. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[codecov]

Codecov Report

Attention: Patch coverage is 60.71429% with 11 lines in your changes missing coverage. Please review.

Project coverage is 74.19%. Comparing base (7ac9e6b) to head (f69467c).
Report is 836 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6851      +/-   ##
==========================================
- Coverage   74.21%   74.19%   -0.03%     
==========================================
  Files         414      414              
  Lines       43483    43507      +24     
==========================================
+ Hits        32273    32282       +9     
- Misses       8326     8358      +32     
+ Partials     2884     2867      -17     

Flag	Coverage Δ
unittests	74.19% <60.71%> (-0.03%)	⬇️

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[ti-chi-bot]

PR needs rebase.

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/test-infra repository.