cluster: return NodeState in the response of StoreHeartbeat.

[LykxSassinator]

What problem does this PR solve?

Issue Number: Close #9001, Ref tikv/tikv#18107, Ref tikv/tikv#18042

What is changed and how does it work?

This PR mainly contains the cooperative works on mitigating the performance impacts when scaling.

In this PR, it returns the NodeState in StoreHeartbeatResponse to store nodes,
to notify the corresponsive store to handle it if necessary.

In this PR, it returns the `NodeState` in `StoreHeartbeatResponse` to store nodes,
to notify the corresponsive store to handle it if necessary.

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

None.

[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

[LykxSassinator]

/retest

[LykxSassinator]

/cc @bufferflies @rleungx

[lhy1024]

LGTM. But we also need to update go mod before merge PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.30%. Comparing base (2ae49cb) to head (d85be4c).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8991      +/-   ##
==========================================
- Coverage   76.33%   76.30%   -0.03%     
==========================================
  Files         465      465              
  Lines       70534    70535       +1     
==========================================
- Hits        53839    53825      -14     
- Misses      13356    13366      +10     
- Partials     3339     3344       +5     

Flag	Coverage Δ
unittests	76.30% <100.00%> (-0.03%)	⬇️

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

[bufferflies]

rest lgtm, need to merge the kvproto pr first

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lhy1024, rleungx

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [lhy1024,rleungx]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-16 06:09:07.61438569 +0000 UTC m=+185219.069431839: ☑️ agreed by lhy1024.
• 2025-01-16 08:15:55.535408329 +0000 UTC m=+192826.990454472: ☑️ agreed by rleungx.

[rleungx]

/hold

[rleungx]

Let's wait for pingcap/kvproto#1291 to be merged first.

[lhy1024]

we can merge it

[LykxSassinator]

/cc @rleungx

[rleungx]

/hold cancel