decrease pending gc task count when return

[JacksonYao287]

No description provided.

[Besroy]

lgtm, thanks for the fix

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 14.28571% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.54%. Comparing base (1746bcc) to head (604c077).
⚠️ Report is 119 commits behind head on main.

Files with missing lines	Patch %	Lines
src/lib/homestore_backend/gc_manager.cpp	14.28%	6 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #345      +/-   ##
==========================================
- Coverage   63.15%   58.54%   -4.62%     
==========================================
  Files          32       35       +3     
  Lines        1900     4337    +2437     
  Branches      204      527     +323     
==========================================
+ Hits         1200     2539    +1339     
- Misses        600     1532     +932     
- Partials      100      266     +166     

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[xiaoxichen]

GC stuck graceful shutdown?

[JacksonYao287]

GC stuck graceful shutdown?

it is stuck on destroy_pg before baseline resync

HomeObject/src/lib/homestore_backend/hs_pg_manager.cpp

Lines 459 to 460 in 604c077

	gc_mgr_->drain_pg_pending_gc_task(pg_id);