*: Fix max snapshot lifetime is not shown on Grafana (#8102)

[ti-chi-bot]

This is an automated cherry-pick of #8102

What problem does this PR solve?

Issue Number: close #7713

Problem Summary:

After #7706, when PS V3 or UniPS is enabled, the metrics of max snapshot lifetime is always reported to prometheus as 0.

What is changed and how it works?

When PS V3 or UniPS is enabled, get and report the metrics in AsynchronousMetrics::update

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  • Block the queries by using DBGInvoke disable_fail_point(hang_in_execution) through tiflash client
  • We can see that the max snapshot lifetime is reported normally on Grafana
    
• 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

[JaySon-Huang]

/run-all-tests

[JaySon-Huang]

/run-all-tests

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JaySon-Huang, Lloyd-Pottiger

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• OWNERS [JaySon-Huang,Lloyd-Pottiger]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-09-21 03:17:25.340731006 +0000 UTC m=+746611.308319041: ☑️ agreed by JaySon-Huang.
• 2023-09-21 09:05:55.009645057 +0000 UTC m=+767520.977233089: ☑️ agreed by Lloyd-Pottiger.

[ti-chi-bot]

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