enhance: add more metrics (#31271)

[longjiquan]

/kind improvement
pr: #31271
fix: #31272

This pr add more metrics, which are:

Slow query count, which the duration considered as slow can be configurable;
Number of deleted entities;
Number of entities per collection;
Number of loaded entities per collection;
Number of indexed entities;
Number of indexed entities, per collection, per index and whether it's a vetor index;
Quota states (LongTimeTickDelay, MemoryExhuasted, DiskQuotaExhuasted) per database;

[mergify]

@longjiquan ut workflow job failed, comment rerun ut can trigger the job again.

[codecov]

Codecov Report

Attention: Patch coverage is 71.77914% with 46 lines in your changes are missing coverage. Please review.

Project coverage is 82.20%. Comparing base (c8658d1) to head (9a1038a).
Report is 3 commits behind head on 2.3.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.3   #31511      +/-   ##
==========================================
- Coverage   82.24%   82.20%   -0.04%     
==========================================
  Files         844      844              
  Lines      122408   122691     +283     
==========================================
+ Hits       100669   100859     +190     
- Misses      18501    18579      +78     
- Partials     3238     3253      +15     

Files	Coverage Δ
internal/datacoord/meta.go	88.80% <100.00%> (+0.01%)	⬆️
internal/datacoord/metrics_info.go	94.68% <100.00%> (+1.13%)	⬆️
pkg/metrics/metrics.go	100.00% <ø> (ø)
pkg/metrics/proxy_metrics.go	100.00% <100.00%> (ø)
pkg/metrics/rootcoord_metrics.go	100.00% <100.00%> (ø)
pkg/util/metricsinfo/metrics_info.go	100.00% <ø> (ø)
pkg/util/paramtable/component_param.go	98.34% <100.00%> (+<0.01%)	⬆️
internal/querynodev2/metrics_info.go	72.35% <65.00%> (-0.68%)	⬇️
internal/proxy/impl.go	85.52% <0.00%> (-0.20%)	⬇️
internal/rootcoord/quota_center.go	87.20% <60.60%> (-3.58%)	⬇️

... and 18 files with indirect coverage changes

[mergify]

@longjiquan E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[czs007]

/run-cpu-e2e

[czs007]

/approve
/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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