fix:[2.5] analyzer memory leak because function runner not close

[aoiasd]

relate: #41213
pr:#41839

[aoiasd]

rerun ut

[aoiasd]

rerun ut

[codecov]

Codecov Report

Attention: Patch coverage is 11.76471% with 15 lines in your changes missing coverage. Please review.

Project coverage is 80.62%. Comparing base (0ecf999) to head (351ed9c).
Report is 12 commits behind head on 2.5.

Files with missing lines	Patch %	Lines
.../flushcommon/pipeline/flow_graph_embedding_node.go	0.00%	4 Missing ⚠️
internal/querynodev2/pipeline/embedding_node.go	0.00%	4 Missing ⚠️
...rnal/util/function/multi_analyzer_bm25_function.go	0.00%	4 Missing ⚠️
internal/util/function/bm25_function.go	0.00%	2 Missing ⚠️
internal/datanode/importv2/util.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.5   #41840      +/-   ##
==========================================
- Coverage   80.64%   80.62%   -0.02%     
==========================================
  Files        1427     1427              
  Lines      204821   204940     +119     
==========================================
+ Hits       165174   165239      +65     
- Misses      33843    33888      +45     
- Partials     5804     5813       +9     

Components	Coverage Δ
Client	79.42% <ø> (-0.03%)	⬇️
Core	70.67% <ø> (+0.01%)	⬆️
Go	82.59% <11.76%> (-0.02%)	⬇️

Files with missing lines	Coverage Δ
internal/util/function/function.go	100.00% <ø> (ø)
internal/util/pipeline/node.go	100.00% <100.00%> (ø)
internal/util/pipeline/pipeline.go	88.37% <100.00%> (+0.27%)	⬆️
internal/datanode/importv2/util.go	64.22% <0.00%> (-0.60%)	⬇️
internal/util/function/bm25_function.go	80.35% <0.00%> (-1.47%)	⬇️
.../flushcommon/pipeline/flow_graph_embedding_node.go	82.00% <0.00%> (-3.42%)	⬇️
internal/querynodev2/pipeline/embedding_node.go	88.73% <0.00%> (-2.58%)	⬇️
...rnal/util/function/multi_analyzer_bm25_function.go	64.90% <0.00%> (-1.77%)	⬇️

... and 43 files with indirect coverage changes

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[aoiasd]

rerun ut

[congqixia]

/lgtm

[sre-ci-robot]

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