fix: revert 'add missing tiproxy label'

[xhebox]

What problem does this PR solve?

What is changed and how does it work?

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

[codecov-commenter]

Codecov Report

Merging #5244 (f70339b) into master (ddc83e6) will increase coverage by 7.43%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5244      +/-   ##
==========================================
+ Coverage   57.76%   65.19%   +7.43%     
==========================================
  Files         246      249       +3     
  Lines       29479    32815    +3336     
==========================================
+ Hits        17029    21395    +4366     
+ Misses      10795     9729    -1066     
- Partials     1655     1691      +36     

Flag	Coverage Δ
e2e	48.60% <ø> (?)
unittest	57.77% <ø> (+0.01%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: csuzhangxc

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-15 01:50:16.748447154 +0000 UTC m=+595781.297463141: ☑️ agreed by csuzhangxc.

[xhebox]

/run-all-tests

[xhebox]

/run pull-e2e-kind-serial
/run pull-e2e-kind-across-kubernetes

[ti-chi-bot]

@xhebox: The label(s) /pull-e2e-kind-serial, /pull-e2e-kind-across-kubernetes cannot be applied, because the repository doesn't have them.

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[xhebox]

/test pull-e2e-kind-serial
/test pull-e2e-kind-across-kubernetes

[ti-chi-bot]

@xhebox: The label(s) /pull-e2e-kind-serial, /pull-e2e-kind-across-kubernetes cannot be applied, because the repository doesn't have them.

In response to this:

/test pull-e2e-kind-serial
/test pull-e2e-kind-across-kubernetes

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[ti-chi-bot]

@xhebox: No presubmit jobs available for pingcap/tidb-operator@master

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/test pull-e2e-kind-serial
/test pull-e2e-kind-across-kubernetes

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