metrics: add metrics for table memory consumption (#1846)

[ti-chi-bot]

This is an automated cherry-pick of #1846

What problem does this PR solve?

• Lack of observability of processor's table memory consumption (down from the sorter)

What is changed and how it works?

• Added two Grafana panels for metrics added for flow control.

Check List

Tests

• Manual test

Related changes

• Need to cherry-pick to the release branch
• Need to update key monitor metrics in both TiCDC document and official document

Release note

• Add metrics for table memory consumption

[liuzix]

/cc @amyangfei @overvenus

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• amyangfei
• liuzix

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[amyangfei]

/merge

[ti-chi-bot]

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

Commit hash: ef5d04f

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@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.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

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 ti-community-infra/tichi repository.

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@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.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

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 ti-community-infra/tichi repository.

[codecov-commenter]

Codecov Report

Merging #1884 (afd436e) into release-4.0 (753073a) will decrease coverage by 0.1767%.
The diff coverage is 62.5048%.

@@                 Coverage Diff                 @@
##           release-4.0      #1884        +/-   ##
===================================================
- Coverage      53.7661%   53.5894%   -0.1768%     
===================================================
  Files              153        163        +10     
  Lines            15958      17287      +1329     
===================================================
+ Hits              8580       9264       +684     
- Misses            6475       7046       +571     
- Partials           903        977        +74