playground: fix metric targets will be overrided

[xhebox]

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

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c3e9fc5) 55.52% compared to head (ca73d23) 55.52%.

❗ Current head ca73d23 differs from pull request most recent head 06ce900. Consider uploading reports for the commit 06ce900 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2324      +/-   ##
==========================================
- Coverage   55.52%   55.52%   -0.00%     
==========================================
  Files         325      325              
  Lines       34753    34757       +4     
==========================================
+ Hits        19295    19296       +1     
- Misses      13145    13147       +2     
- Partials     2313     2314       +1     

Flag	Coverage Δ
playground	15.24% <100.00%> (+<0.01%)	⬆️
tiup	33.48% <ø> (ø)
unittest	22.30% <0.00%> (-<0.01%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-30 03:48:06.18855599 +0000 UTC m=+1067314.853782184: ☑️ agreed by kaaaaaaang.

[kaaaaaaang]

/lgtm

[rleungx]

/lgtm

[ti-chi-bot]

@rleungx: adding LGTM is restricted to approvers and reviewers in OWNERS files.

In response to this:

/lgtm

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ti-chi-bot]

@rleungx: adding LGTM is restricted to approvers and reviewers in OWNERS files.

In response to this:

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kaaaaaaang]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaaaaaaang

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [kaaaaaaang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment