[monitor][broker][metadata] add metrics for BatchMetadataStore

[tjiuming]

Motivation

add metrics for batch_metadata_store.
This PR should being merged after #17041 in case of conflicts.

Documentation

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Matching PR in forked repository

PR in forked repository: tjiuming#7

[Jason918]

TIP: You can covert PR status to draft, if it's not ready for review. :)

[tjiuming]

TIP: You can covert PR status to draft, if it's not ready for review. :)

Thanks~

[Jason918]

TIP: You can covert PR status to draft, if it's not ready for review. :)

Thanks~

See this.

[tjiuming]

@codelipenghui @asafm PTAL

[asafm]

Looks good. Mainly minor syntax comments aside from one main comment.

[tjiuming]

@asafm I've updated the PR and only keeps pulsar_batch_metadata_store_executor_queue_size, pulsar_batch_metadata_store_queue_wait_time.
and add pulsar_batch_metadata_store_batch_execute_time pulsar_batch_metadata_store_perbatch_ops

[asafm]

Looks good. One small comment left.

[tjiuming]

@codelipenghui PTAL

[codelipenghui]

/pulsarbot run-failure-checks

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 38.69%. Comparing base (0866c3a) to head (5127d25).
⚠️ Report is 3399 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #17072      +/-   ##
============================================
- Coverage     38.97%   38.69%   -0.29%     
+ Complexity     8311     8262      -49     
============================================
  Files           683      685       +2     
  Lines         67325    67335      +10     
  Branches       7217     7216       -1     
============================================
- Hits          26239    26053     -186     
- Misses        38079    38281     +202     
+ Partials       3007     3001       -6     

Flag	Coverage Δ
unittests	38.69% <ø> (-0.29%)	⬇️

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see 34 files with indirect coverage changes

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[tjiuming]

/pulsarbot run-failure-checks

[tjiuming]

@codelipenghui all the required checks are passed

[momo-jun]

@tjiuming did you have a plan to add some information about the new metrics?

[tjiuming]

@tjiuming did you have a plan to add some information about the new metrics?

there are already a PR for the doc, I'll update it soon