optimize ut in podopslifecycle controller

[shaofan-hs]

1. Does this PR affect any open issues?(Y/N) and add issue references :

• N
• Y

re #137

2. What is the scope of this PR (e.g. component or file name):

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

6. Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (3afbc70) 60.81% compared to head (c605fb3) 62.02%.

Files	Patch %	Lines
...lers/podopslifecycle/podopslifecycle_controller.go	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
+ Coverage   60.81%   62.02%   +1.20%     
==========================================
  Files          46       46              
  Lines        3573     3573              
==========================================
+ Hits         2173     2216      +43     
+ Misses       1188     1140      -48     
- Partials      212      217       +5     

Flag	Coverage Δ
unittests	62.02% <66.66%> (+1.20%)	⬆️

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[Eikykun]

/lgtm