fix: some missing metrics for WebUI restful API

[jaime0815]

issue: #36621

[mergify]

@jaime0815

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[mergify]

@jaime0815 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.66%. Comparing base (257ecab) to head (6ce9a7f).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #37747      +/-   ##
==========================================
- Coverage   80.68%   80.66%   -0.02%     
==========================================
  Files        1357     1357              
  Lines      190750   190780      +30     
==========================================
- Hits       153910   153902       -8     
- Misses      31415    31445      +30     
- Partials     5425     5433       +8     

Components	Coverage Δ
Client	61.25% <ø> (ø)
Core	68.87% <ø> (ø)
Go	83.19% <100.00%> (-0.03%)	⬇️

Files with missing lines	Coverage Δ
internal/proxy/http_req_impl.go	69.20% <100.00%> (+2.88%)	⬆️
internal/proxy/impl.go	85.06% <100.00%> (ø)
internal/rootcoord/list_db_task.go	100.00% <100.00%> (ø)
pkg/util/metricsinfo/metrics_info.go	100.00% <ø> (ø)

... and 24 files with indirect coverage changes

[jaime0815]

/run-cpu-e2e

[mergify]

@jaime0815 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[jaime0815]

/run-cpu-e2e

[SimFG]

/lgtm

[SimFG]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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This pull-request has been approved by: jaime0815

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