cluster: no more redundant etcd writes when ReportMinResolvedTS is called (#5966)

[ti-chi-bot]

This is an automated cherry-pick of #5966

Signed-off-by: HunDunDM hundundm@gmail.com

What problem does this PR solve?

Issue Number: Close #5965

What is changed and how does it work?

no more redundant etcd writes when SetMinResolvedTS is called

Check List

Tests

• Unit test
• Manual test (add detailed scripts or steps below)
  • This PR is based on c64be1f
  • Make putStoreLocked called by SetMinResolvedTS slower 7a47041
  • tiup playground v6.5.0 --kv=15 --db=1 --pd=1 --tiflash=0 --pd.binpath=bin/pd-server
  • The problem can be reproduced in grafana
    • 
    • 
  • putStoreLocked was removed in this PR and replaced with c.core.PutStore(newStore), so it can be considered fixed.

Code changes

Side effects

Related changes

• Need to cherry-pick to the release branch

Release note

Fixed an issue where ETCD write delay could cause PD OOM.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• nolouch

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[nolouch]

/merge

[ti-chi-bot]

@nolouch: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

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

Commit hash: a3ad88f