feat: support query aggregtion

[MrPresent-Han]

related: #36380

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[codecov]

Codecov Report

Attention: Patch coverage is 63.62416% with 271 lines in your changes missing coverage. Please review.

Project coverage is 82.84%. Comparing base (e5eb115) to head (00e8f94).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/agg/aggregate.go	63.16%	172 Missing and 21 partials ⚠️
internal/proxy/task_query.go	64.78%	21 Missing and 4 partials ⚠️
internal/proxy/util.go	42.42%	17 Missing and 2 partials ⚠️
internal/util/typeutil/hash.go	50.00%	15 Missing ⚠️
internal/querynodev2/handlers.go	56.25%	5 Missing and 2 partials ⚠️
internal/querynodev2/segments/agg_reducer.go	77.77%	4 Missing and 2 partials ⚠️
internal/proxy/agg_reducer.go	84.21%	2 Missing and 1 partial ⚠️
internal/querynodev2/services.go	40.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #38452      +/-   ##
==========================================
+ Coverage   81.11%   82.84%   +1.72%     
==========================================
  Files        1395     1100     -295     
  Lines      197298   171236   -26062     
==========================================
- Hits       160037   141854   -18183     
+ Misses      31623    23731    -7892     
- Partials     5638     5651      +13     

Components	Coverage Δ
Client	79.53% <ø> (ø)
Core	∅ <ø> (∅)
Go	82.97% <65.47%> (-0.07%)	⬇️

Files with missing lines	Coverage Δ
internal/proxy/reducer.go	100.00% <100.00%> (ø)
internal/proxy/task.go	80.64% <ø> (ø)
internal/proxy/task_search.go	76.34% <100.00%> (-0.24%)	⬇️
internal/querynodev2/segments/reducer.go	90.90% <100.00%> (ø)
internal/querynodev2/segments/result.go	71.58% <ø> (+0.06%)	⬆️
internal/querynodev2/segments/segment.go	65.16% <ø> (ø)
internal/querynodev2/server.go	77.57% <100.00%> (+0.11%)	⬆️
internal/querynodev2/tasks/search_task.go	84.47% <100.00%> (+0.03%)	⬆️
internal/util/initcore/init_core.go	87.03% <100.00%> (+0.16%)	⬆️
internal/util/segmentutil/utils.go	100.00% <100.00%> (ø)
... and 8 more

... and 324 files with indirect coverage changes

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[MrPresent-Han]

/run-cpu-e2e

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rerun go-sdk

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