owner(ticdc): fix changefeed backoff

[CharlesCheung96]

What problem does this PR solve?

Issue Number: close #9697

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

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

Release note

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[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[asddongmen]

/test verify

[asddongmen]

Well done! After the addition of the pending and warning states, there's no longer a need for a stateWindow to check if the changefeed is in an error-retrying state. This PR makes the error retry logic more concise and reduces the complexity of the code.

[CharlesCheung96]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 3AceShowHand, hicqu

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-09-07 10:25:43.483099608 +0000 UTC m=+2613908.032115594: ☑️ agreed by 3AceShowHand.
• 2023-09-07 10:46:22.41128786 +0000 UTC m=+2615146.960303846: ☑️ agreed by hicqu.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #9698.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #9699.