cluster: distinguish cookie names of multiple grafana instances

[AstroProfundis]

What problem does this PR solve?

Close #1490

Related changes

• Need to cherry-pick to the release branch

Release notes:

cluster: distinguish cookie names of multiple grafana instances

[codecov-commenter]

Codecov Report

Merging #1491 (dd4c2f3) into master (0f790d6) will increase coverage by 0.17%.
The diff coverage is n/a.

❗ Current head dd4c2f3 differs from pull request most recent head 08fa236. Consider uploading reports for the commit 08fa236 to get more accurate results

@@            Coverage Diff             @@
##           master    #1491      +/-   ##
==========================================
+ Coverage   26.26%   26.44%   +0.17%     
==========================================
  Files         267      229      -38     
  Lines       23834    21446    -2388     
==========================================
- Hits         6261     5672     -589     
+ Misses      16750    14875    -1875     
- Partials      823      899      +76     

Flag	Coverage Δ
dm	26.44% <ø> (?)
integrate	26.44% <ø> (+10.24%)	⬆️
tiup	?
unittest	?

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

Impacted Files	Coverage Δ
pkg/utils/regexp.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/repository/store/store.go	0.00% <0.00%> (-100.00%)	⬇️
components/dm/ansible/worker.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/telemetry/telemetry.go	0.00% <0.00%> (-83.34%)	⬇️
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/utils/semver.go	4.72% <0.00%> (-81.89%)	⬇️
pkg/meta/err.go	0.00% <0.00%> (-77.78%)	⬇️
pkg/repository/progress.go	23.07% <0.00%> (-76.93%)	⬇️
... and 223 more

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[lucklove]

LGTM

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• lucklove

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: fc5e57d