redo(ticdc): use uuid in redo meta filename (#8075)

[ti-chi-bot]

This is an automated cherry-pick of #8075

What problem does this PR solve?

Issue Number: close #8074, close #8028

What is changed and how it works?

1. Use uuid in redo meta filename to avoid frequent access to the same object.

2. Add metricRedoWorkerBusyRatio to redoManager.
   

3. Fix the limit on flush-interval.

4. Add test.Dockerfile facilitate testing.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

`None`.

[ti-chi-bot]

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.1@d418b6d). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 62c2900 differs from pull request most recent head e4100f9. Consider uploading reports for the commit e4100f9 to get more accurate results

Additional details and impacted files

Flag	Coverage Δ
cdc	65.5197% <0.0000%> (?)
dm	56.0173% <0.0000%> (?)
engine	65.2393% <0.0000%> (?)

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

@@               Coverage Diff                @@
##             release-6.1      #8129   +/-   ##
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  Coverage               ?   61.0906%           
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  Files                  ?        998           
  Lines                  ?     134230           
  Branches               ?          0           
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  Hits                   ?      82002           
  Misses                 ?      45422           
  Partials               ?       6806           

[CharlesCheung96]

/hold wait for validating test_infra tests

[CharlesCheung96]

/unhold test pass, plan id: 1590052, 1590053

[CharlesCheung96]

/merge

[ti-chi-bot]

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

Commit hash: e4100f9

[CharlesCheung96]

/run-integration-test
/run-verify

[CharlesCheung96]

/run-kafka-integration-test

[CharlesCheung96]

/run-kafka-integration-test

[CharlesCheung96]

/run-kafka-integration-test