Add new API for searching on sealed segment without index

[cydrain]

Signed-off-by: yudong.cai yudong.cai@zilliz.com
Issue: #17599 #17945

[mergify]

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

[cydrain]

/run-cpu-e2e

[codecov]

Codecov Report

Merging #18830 (7fa1ace) into master (dcf45df) will increase coverage by 0.03%.
The diff coverage is 95.23%.

@@            Coverage Diff             @@
##           master   #18830      +/-   ##
==========================================
+ Coverage   81.33%   81.36%   +0.03%     
==========================================
  Files         542      542              
  Lines       81261    81264       +3     
==========================================
+ Hits        66095    66124      +29     
+ Misses      12293    12270      -23     
+ Partials     2873     2870       -3     

Impacted Files	Coverage Δ
internal/core/src/segcore/SegmentGrowingImpl.cpp	78.28% <0.00%> (ø)
internal/core/src/query/SearchOnSealed.cpp	94.11% <100.00%> (+2.22%)	⬆️
internal/core/src/segcore/SegmentSealedImpl.cpp	77.32% <100.00%> (-0.37%)	⬇️
internal/config/etcd_source.go	71.73% <0.00%> (-3.27%)	⬇️
internal/datacoord/segment_manager.go	82.82% <0.00%> (-1.39%)	⬇️
internal/datacoord/server.go	76.14% <0.00%> (-0.66%)	⬇️
internal/indexcoord/meta_table.go	65.28% <0.00%> (-0.27%)	⬇️
internal/proxy/impl.go	91.04% <0.00%> (+0.45%)	⬆️
internal/querycoord/query_coord.go	77.38% <0.00%> (+0.56%)	⬆️
... and 6 more

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, cydrain

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