owner(ticdc): Add backoff mechanism into changefeed restart logic (#4262)

[ti-chi-bot]

This is an automated cherry-pick of #4262

What problem does this PR solve?

Issue Number: close #3329 close #3987

What is changed and how it works?

Before this optimization:
When errors occurred in a changefeed, a simple backoff is leveraged to restart a changefeed:
If there are three errors which occurred in two minutes, the changefeed stays in "error" state and won't be restarted imediately.

After this optimization:
We utilize an exponential backoff mechanism in the changefeed restart logic. The mechanism is elaborated as follows:

1. When we need to restart a changefeed in "error" state, the restart interval is varying from an InitialInterval to a MaxInterval. And if the duration since backoff start exceed the MaxElapsedTime, the changefeed will be switched to "failed" state and will not be restarted until it is manually resumed.
2. If the changefeed was running normally in a period of time and it encounters error at present, we can reset the backoff and let the restart interval vary from the InitialInterval.

Check List

Tests

• Unit test
• Integration test

Release note

Add exponential backoff mechanism for restarting a changefeed.

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[codecov-commenter]

Codecov Report

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[zhaoxinyu]

/merge

[ti-chi-bot]

@zhaoxinyu: /merge is only allowed for the committers, you can assign this pull request to the committer in list by filling /assign @committer in the comment to help merge this pull request.

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/merge

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[overvenus]

/merge

[ti-chi-bot]

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

Commit hash: c812709

[zhaoxinyu]

/run-integration-test
/run-unit-test

[zhaoxinyu]

/run-unit-test

[zhaoxinyu]

/run-integration-test