enhance: use GPU pool for gpu tasks

[yah01]

• this much improve the performance for GPU index

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (99e0f1e) 83.72% compared to head (752184e) 80.83%.
Report is 10 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #29678      +/-   ##
==========================================
- Coverage   83.72%   80.83%   -2.89%     
==========================================
  Files         679      922     +243     
  Lines      108623   127316   +18693     
==========================================
+ Hits        90949   102922   +11973     
- Misses      14361    21081    +6720     
  Partials     3313     3313              

Files	Coverage Δ
internal/querynodev2/tasks/query_stream_task.go	80.95% <100.00%> (+0.95%)	⬆️
internal/querynodev2/tasks/query_task.go	89.88% <100.00%> (+0.23%)	⬆️
internal/querynodev2/tasks/task.go	77.25% <100.00%> (+0.19%)	⬆️
internal/querynodev2/tasks/tasks.go	57.89% <ø> (ø)
pkg/util/indexparamcheck/index_type.go	100.00% <100.00%> (ø)
pkg/util/paramtable/component_param.go	98.13% <100.00%> (+<0.01%)	⬆️
internal/querynodev2/segments/collection.go	90.84% <81.81%> (-0.76%)	⬇️
...nal/querynodev2/tasks/concurrent_safe_scheduler.go	88.42% <57.14%> (-1.26%)	⬇️

... and 264 files with indirect coverage changes

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, yah01

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• internal/querynodev2/segments/OWNERS [congqixia]
• internal/querynodev2/tasks/OWNERS [congqixia]
• pkg/util/OWNERS [congqixia]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment