ttl: cancel the hearbeat timeout job after disable the TTL (#57452)

[ti-chi-bot]

This is an automated cherry-pick of #57452

What problem does this PR solve?

Issue Number: close #57404

Problem Summary:

If a job's hearbeat timeout, it cannot be cancelled after disabling the TTL job.

What changed and how does it work?

Move the logic of locking the heartbeat timeout job above the logic of cancelling jobs.

Check List

Tests

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

  • I checked and no code files have been changed.

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

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Adding the do-not-merge/cherry-pick-not-approved label.

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@ti-chi-bot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/unit-test	9a8bb92	link	true	/test unit-test
idc-jenkins-ci-tidb/build	9a8bb92	link	true	/test build
idc-jenkins-ci-tidb/check_dev	9a8bb92	link	true	/test check-dev

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