cluster: use initial_commit_ts in drainer config file instead of start script

[nexustar]

What problem does this PR solve?

• close --initial-commit-ts should not be recorded at run_drainer.sh #1682

What is changed and how it works?

Check List

Tests

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

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

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

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• AstroProfundis

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[codecov-commenter]

Codecov Report

Merging #1706 (c45e6b8) into master (e97056e) will increase coverage by 28.72%.
The diff coverage is 50.00%.

@@             Coverage Diff             @@
##           master    #1706       +/-   ##
===========================================
+ Coverage   24.47%   53.18%   +28.72%     
===========================================
  Files         277      303       +26     
  Lines       31412    34245     +2833     
===========================================
+ Hits         7686    18213    +10527     
+ Misses      22875    13886     -8989     
- Partials      851     2146     +1295     

Flag	Coverage Δ
cluster	41.41% <50.00%> (?)
dm	24.73% <0.00%> (?)
playground	12.73% <0.00%> (?)
tiup	14.60% <0.00%> (+0.02%)	⬆️
unittest	21.36% <28.57%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
pkg/cluster/ansible/service.go	4.60% <0.00%> (-0.02%)	⬇️
pkg/cluster/spec/drainer.go	60.71% <ø> (+57.19%)	⬆️
pkg/cluster/template/scripts/drainer.go	70.73% <ø> (+70.73%)	⬆️
pkg/cluster/spec/spec.go	82.83% <58.33%> (+30.65%)	⬆️
pkg/cluster/operation/destroy.go	59.40% <0.00%> (ø)
pkg/cluster/operation/scale_in.go	55.13% <0.00%> (ø)
pkg/logger/audit.go	52.17% <0.00%> (ø)
pkg/logger/logger.go	100.00% <0.00%> (ø)
components/playground/instance/process.go	81.97% <0.00%> (ø)
components/playground/instance/tiflash_config.go	70.59% <0.00%> (ø)
... and 220 more

---

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: c580f10