update variable type of tidb cluster id

[AstroProfundis]

What problem does this PR solve?

The ID is an int64 number.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• nexustar

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[codecov-commenter]

Codecov Report

Merging #1580 (7864480) into master (a11bd32) will increase coverage by 18.77%.
The diff coverage is 0.00%.

❗ Current head 7864480 differs from pull request most recent head 06746f4. Consider uploading reports for the commit 06746f4 to get more accurate results

@@             Coverage Diff             @@
##           master    #1580       +/-   ##
===========================================
+ Coverage   15.77%   34.55%   +18.77%     
===========================================
  Files         149      228       +79     
  Lines       15023    21213     +6190     
===========================================
+ Hits         2370     7330     +4960     
- Misses      12134    12791      +657     
- Partials      519     1092      +573     

Flag	Coverage Δ
cluster	34.55% <0.00%> (?)
integrate	34.55% <0.00%> (+18.77%)	⬆️
tiup	?
unittest	?

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

Impacted Files	Coverage Δ
pkg/cluster/api/pdapi.go	35.64% <0.00%> (+35.64%)	⬆️
pkg/repository/store/store.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%)	⬇️
pkg/repository/store/local.go	0.00% <0.00%> (-82.61%)	⬇️
pkg/repository/progress.go	23.07% <0.00%> (-76.93%)	⬇️
pkg/telemetry/meta.go	0.00% <0.00%> (-67.40%)	⬇️
pkg/telemetry/telemetry.go	0.00% <0.00%> (-66.67%)	⬇️
pkg/repository/v1manifest/keys.go	5.33% <0.00%> (-58.67%)	⬇️
pkg/repository/merge_mirror.go	0.00% <0.00%> (-58.51%)	⬇️
... and 207 more

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: 06746f4