cluster: fix getClusterID() type

[nexustar]

What problem does this PR solve?

getClusterID() return wrong type in last commit

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 #1574 (89421b8) into master (75cc31e) will increase coverage by 18.20%.
The diff coverage is 0.00%.

❗ Current head 89421b8 differs from pull request most recent head bf5827c. Consider uploading reports for the commit bf5827c to get more accurate results

@@             Coverage Diff             @@
##           master    #1574       +/-   ##
===========================================
+ Coverage   26.17%   44.38%   +18.20%     
===========================================
  Files         266      290       +24     
  Lines       24063    26170     +2107     
===========================================
+ Hits         6299    11616     +5317     
+ Misses      16941    12993     -3948     
- Partials      823     1561      +738     

Flag	Coverage Δ
cluster	29.01% <0.00%> (?)
dm	26.37% <0.00%> (?)
integrate	37.44% <0.00%> (+21.65%)	⬆️
playground	13.52% <0.00%> (?)
tiup	?
unittest	22.72% <0.00%> (ø)

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

Impacted Files	Coverage Δ
pkg/cluster/api/pdapi.go	43.67% <0.00%> (+43.67%)	⬆️
main.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/repository/utils/hash.go	0.00% <0.00%> (-83.34%)	⬇️
pkg/repository/model/publish.go	0.00% <0.00%> (-83.34%)	⬇️
cmd/env.go	27.77% <0.00%> (-66.67%)	⬇️
pkg/utils/args.go	0.00% <0.00%> (-50.00%)	⬇️
cmd/root.go	23.61% <0.00%> (-48.62%)	⬇️
pkg/repository/model/model.go	0.00% <0.00%> (-47.52%)	⬇️
pkg/repository/v1manifest/repo.go	0.00% <0.00%> (-47.50%)	⬇️
cmd/uninstall.go	30.88% <0.00%> (-44.12%)	⬇️
... and 195 more

---

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: bf5827c