Issue 8232: ensure the ending event sinked before shutdown

[Lyndon-Li]

Fix issue #8232, ensure the ending event sinked before shutdown

[codecov]

Codecov Report

Attention: Patch coverage is 81.42857% with 13 lines in your changes missing coverage. Please review.

Project coverage is 59.20%. Comparing base (3f9c2dc) to head (9deaa81).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/util/kube/event.go	82.53%	8 Missing and 3 partials ⚠️
pkg/datamover/backup_micro_service.go	50.00%	1 Missing ⚠️
pkg/datamover/restore_micro_service.go	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8237      +/-   ##
==========================================
+ Coverage   59.15%   59.20%   +0.05%     
==========================================
  Files         367      367              
  Lines       30777    30838      +61     
==========================================
+ Hits        18206    18259      +53     
- Misses      11113    11119       +6     
- Partials     1458     1460       +2     

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