*: Auto refresh PD addrs for PDPlacementManager, PDLabelManager, TiFlashPDPlacementManager (#33909)

[ti-srebot]

cherry-pick #33909 to release-5.3
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/33913

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/tidb.git pr/33913:release-5.3-14f4888fb3d7

---

…TiFlashPDPlacementManager

What problem does this PR solve?

Issue Number: close #33908

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  1. start a tidb cluster with 1 pd
  2. tiup playground scale-out --pd 2
  3. tiup playground scale-in --pid
  4. Execute DDL: create placement policy p1 followers=1;create table t1(a int) placement policy p1
  5. DDL successed
• No code

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.

fix bug ddl will not work well when PD member changed

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lcwangchao
• xhebox

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[ti-srebot]

/run-all-tests

[ti-srebot]

@lcwangchao please accept the invitation then you can push to the cherry-pick pull requests. Comment with /cherry-pick-invite if the invitation is expired.
https://github.com/ti-srebot/tidb/invitations

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/d1bcd7b946731b348dd13ad165b221f9f66b6eeb

[lcwangchao]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: f5cfdf7

[XuHuaiyu]

/merge

[hawkingrei]

/run-all-tests