feat: Add memory tracker

[sunby]

issue: #30822

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[mergify]

@sunby

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[mergify]

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

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.71%. Comparing base (b31d1a1) to head (8c01c18).
Report is 1197 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #30830      +/-   ##
==========================================
- Coverage   80.71%   80.71%   -0.01%     
==========================================
  Files         964      967       +3     
  Lines      137206   137355     +149     
==========================================
+ Hits       110749   110860     +111     
- Misses      22730    22769      +39     
+ Partials     3727     3726       -1     

Files	Coverage Δ
internal/querycoordv2/meta/channel_dist_manager.go	100.00% <100.00%> (ø)
internal/querycoordv2/meta/target.go	94.11% <100.00%> (+3.79%)	⬆️
internal/querycoordv2/meta/target_manager.go	84.97% <100.00%> (+0.12%)	⬆️
internal/querycoordv2/server.go	80.50% <100.00%> (+0.06%)	⬆️
internal/util/memory/memory_tracker.go	94.87% <94.87%> (ø)

... and 22 files with indirect coverage changes

[mergify]

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

[sunby]

/run-cpu-e2e

[sunby]

/run-cpu-e2e