test(dm): fix unsteable test TestRedirectRequestToLeader

[Ehco1996]

What problem does this PR solve?

Issue Number: close #4554

What is changed and how it works?

send reuest after master ready

Check List

Tests

• Unit test

Code changes

Side effects

Related changes

Release note

`None`.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• D3Hunter
• lance6716

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[lance6716]

please also fix that when test failed cancel is not called so it will enter deadlock

[codecov-commenter]

Codecov Report

Merging #4556 (0f49d3e) into master (9607554) will decrease coverage by 0.1184%.
The diff coverage is 59.5223%.

Flag	Coverage Δ
cdc	60.2192% <64.6700%> (+0.2969%)	⬆️
dm	51.5260% <51.6975%> (-0.5029%)	⬇️

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

@@               Coverage Diff                @@
##             master      #4556        +/-   ##
================================================
- Coverage   55.6402%   55.5217%   -0.1185%     
================================================
  Files           494        503         +9     
  Lines         61283      62516      +1233     
================================================
+ Hits          34098      34710       +612     
- Misses        23750      24331       +581     
- Partials       3435       3475        +40     

[Ehco1996]

could you please take another look for this pr ? thanks 🧡🧡🧡

@lance6716

[D3Hunter]

/run-all-tests

[Ehco1996]

/merge

[ti-chi-bot]

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

Commit hash: 6273293

[ti-chi-bot]

@Ehco1996: Your PR was out of date, I have automatically updated it for you.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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[ti-chi-bot]

In response to a cherrypick label: new pull request created: #4649.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #4650.