owner/processor: delete metric when changefeed or processor stops (#2177)

[ti-chi-bot]

This is an automated cherry-pick of #2177

What problem does this PR solve?

Fix #2156

What is changed and how it works?

• Delete metric when changefeed or processor stops
• Master new owner/processor does not have this bug, keep the same behavior as master branch.

Check List

Tests

• Unit test
• Integration test

Release note

• Cleanup changefeed metrics when changefeed is removed.
• Cleanup processor metrics when processor exits.

[ti-chi-bot]

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[amyangfei]

/merge

[amyangfei]

/run-all-tests

[amyangfei]

/run-integration-tests
/run-kafka-tests

[amyangfei]

/run-integration-tests
/run-kafka-tests

[amyangfei]

/run-kafka-tests

[amyangfei]

/run-integration-tests

[codecov-commenter]

Codecov Report

Merging #2313 (268a2e4) into release-4.0 (5a78519) will decrease coverage by 0.3306%.
The diff coverage is 25.0000%.

@@                 Coverage Diff                 @@
##           release-4.0      #2313        +/-   ##
===================================================
- Coverage      54.8080%   54.4774%   -0.3307%     
===================================================
  Files              166        166                
  Lines            19904      19911         +7     
===================================================
- Hits             10909      10847        -62     
- Misses            7938       8028        +90     
+ Partials          1057       1036        -21     

[ti-chi-bot]

@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[amyangfei]

/merge

[ti-chi-bot]

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

Commit hash: 28e34db

[amyangfei]

/run-kafka-tests