cluster: fix timezone check and remove duplicate cleanTasks

[nexustar]

What problem does this PR solve?

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

Base: 43.08% // Head: 51.59% // Increases project coverage by +8.51% 🎉

Coverage data is based on head (4737f5d) compared to base (4397175).
Patch coverage: 92.78% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2045      +/-   ##
==========================================
+ Coverage   43.08%   51.59%   +8.51%     
==========================================
  Files         314      314              
  Lines       36491    36510      +19     
==========================================
+ Hits        15722    18837    +3115     
+ Misses      18890    15456    -3434     
- Partials     1879     2217     +338     

Flag	Coverage Δ
cluster	40.19% <92.78%> (+11.59%)	⬆️
dm	23.72% <0.00%> (+5.66%)	⬆️
playground	12.94% <ø> (+0.01%)	⬆️
tiup	13.93% <ø> (ø)
unittest	20.50% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
pkg/cluster/manager/check.go	69.41% <92.78%> (+64.35%)	⬆️
pkg/cluster/api/cdcapi.go	18.37% <0.00%> (-20.41%)	⬇️
pkg/cluster/spec/cdc.go	43.35% <0.00%> (-10.98%)	⬇️
pkg/utils/http_client.go	41.72% <0.00%> (-3.07%)	⬇️
pkg/cluster/api/binlog.go	36.65% <0.00%> (-1.57%)	⬇️
components/playground/playground.go	50.99% <0.00%> (+0.33%)	⬆️
pkg/repository/v1_repository.go	62.82% <0.00%> (+0.47%)	⬆️
pkg/cluster/manager/scale_out.go	41.33% <0.00%> (+0.51%)	⬆️
pkg/cluster/spec/server_config.go	71.62% <0.00%> (+0.90%)	⬆️
pkg/cluster/spec/grafana.go	64.76% <0.00%> (+1.43%)	⬆️
... and 102 more

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[nexustar]

/merge

[ti-chi-bot]

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

Commit hash: 4737f5d