enhance: Remove unnecessary segment validation on worker node

[weiliu1031]

issue: #38109
This PR remove unnecessary segment validation on worker node, also refine the segment's func call on pin and unpin.

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[codecov]

Codecov Report

Attention: Patch coverage is 80.64516% with 18 lines in your changes missing coverage. Please review.

Project coverage is 81.05%. Comparing base (1084349) to head (460373e).

Files with missing lines	Patch %	Lines
internal/querynodev2/segments/search.go	75.67%	8 Missing and 1 partial ⚠️
internal/querynodev2/segments/statistics.go	45.45%	6 Missing ⚠️
internal/querynodev2/segments/retrieve.go	81.81%	2 Missing ⚠️
internal/querynodev2/handlers.go	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #38108       +/-   ##
===========================================
+ Coverage   68.87%   81.05%   +12.18%     
===========================================
  Files         289     1368     +1079     
  Lines       25484   190912   +165428     
===========================================
+ Hits        17551   154749   +137198     
- Misses       7933    30671    +22738     
- Partials        0     5492     +5492     

Components	Coverage Δ
Client	73.67% <ø> (∅)
Core	68.87% <ø> (ø)
Go	83.19% <80.64%> (∅)

Files with missing lines	Coverage Δ
internal/querynodev2/delegator/delegator.go	87.28% <100.00%> (ø)
internal/querynodev2/tasks/query_stream_task.go	78.72% <100.00%> (ø)
internal/querynodev2/tasks/query_task.go	90.09% <100.00%> (ø)
internal/querynodev2/tasks/search_task.go	84.49% <100.00%> (ø)
internal/querynodev2/handlers.go	77.07% <75.00%> (ø)
internal/querynodev2/segments/retrieve.go	82.53% <81.81%> (ø)
internal/querynodev2/segments/statistics.go	71.79% <45.45%> (ø)
internal/querynodev2/segments/search.go	65.95% <75.67%> (ø)

... and 1071 files with indirect coverage changes