Support cancel fap on TiFlash's side

[CalvinNeo]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

What is changed and how it works?

Check List

Tests

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

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[purelind]

/test ?

[purelind]

/test ?

[ti-chi-bot]

@purelind: The following commands are available to trigger required jobs:

• /test pull-unit-test

Use /test all to run all jobs.

In response to this:

/test ?

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 kubernetes/test-infra repository.

[purelind]

/test pull-unit-test

[CalvinNeo]

/retest

[CalvinNeo]

/retest