ttl: Add TTLTimersSyncer to sync TTL meta to timers

[lcwangchao]

What problem does this PR solve?

Issue Number: close #45164

What is changed and how it works?

TTLTimersSyncer is an struct to do synchronization to sync meta to timers. This PR is only a implement for TTLTimersSyncer but has not used it yet.

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

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

None

[YangKeao]

LGTM

[lcwangchao]

/retest

[ti-chi-bot]

@lcwangchao: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-br-integration-test	09da325	link	true	/test pull-br-integration-test

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[lcwangchao]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, YangKeao

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• OWNERS [YangKeao,hawkingrei]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-07-05 06:42:31.591027011 +0000 UTC m=+186183.524660434: ☑️ agreed by YangKeao.
• 2023-07-06 11:29:59.780390009 +0000 UTC m=+21078.661865956: ☑️ agreed by hawkingrei.