fix: [2.5] Release lock when return function

[xiaocai2333]

issue: #38851

master pr: #38856

[czs007]

/approve
/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

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[sre-ci-robot]

New changes are detected. LGTM label has been removed.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 81.04%. Comparing base (015e50e) to head (303b590).
Report is 1 commits behind head on 2.5.

Files with missing lines	Patch %	Lines
internal/datacoord/compaction.go	0.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.5   #38863      +/-   ##
==========================================
- Coverage   81.05%   81.04%   -0.01%     
==========================================
  Files        1383     1383              
  Lines      195502   195500       -2     
==========================================
- Hits       158462   158443      -19     
- Misses      31463    31481      +18     
+ Partials     5577     5576       -1     

Components	Coverage Δ
Client	78.26% <ø> (ø)
Core	69.45% <ø> (ø)
Go	83.02% <0.00%> (-0.02%)	⬇️

Files with missing lines	Coverage Δ
internal/datacoord/compaction.go	71.10% <0.00%> (-0.28%)	⬇️

... and 29 files with indirect coverage changes