Collect request unit for tiflash compute

[SeaRise]

What problem does this PR solve?

Issue Number: close #6678

Problem Summary:

What is changed and how it works?

• add conf cluster.cluster_id and held by InstanceLabelHolder
• add metrics tiflash_compute_cpu_time_second and add labels cluster_id, process_id; process_id = compute_${host_name}_${start_unix_time}
• add method collectRequestUnit for QueryExecutor and collect cpu time second for mpp, cop and batchCop
• add method collectCPUTimeNs for IBlockInputStream
• add toRU to convert cpu_time_ns to request unit

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• bestwoody
• windtalker

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[SeaRise]

/run-all-tests

[SeaRise]

/rebuild

[SeaRise]

/run-all-tests

[windtalker]

LGTM

[SeaRise]

/hold cputime or ru

[SeaRise]

/hold

[SeaRise]

/run-all-tests

[SeaRise]

/hold cancel

[SeaRise]

/run-all-tests

[SeaRise]

/merge

[ti-chi-bot]

@SeaRise: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

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

Commit hash: 4e067e1