refactor: remove atomic op in #591

[MrCroxx]

Signed-off-by: MrCroxx [email protected]## What's changed and what's your intention?

Please explain IN DETAIL what the changes are in this PR and why they are needed. :D

Compared with #593

Checklist

• I have written the necessary rustdoc comments
• I have added the necessary unit tests and integration tests
• I have passed make all (or make fast instead if the old tests are not modified) in my local environment.

Related issues or PRs (optional)

#591

[codecov]

Codecov Report

Attention: Patch coverage is 90.17857% with 11 lines in your changes missing coverage. Please review.

Project coverage is 86.09%. Comparing base (ef3f139) to head (47e42b2).

❗ Current head 47e42b2 differs from pull request most recent head dde8386

Please upload reports for the commit dde8386 to get more accurate results.

Files	Patch %	Lines
foyer-memory/src/generic.rs	83.33%	6 Missing ⚠️
foyer-memory/src/cache.rs	80.95%	4 Missing ⚠️
foyer/src/hybrid/cache.rs	92.30%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #594      +/-   ##
==========================================
+ Coverage   86.02%   86.09%   +0.06%     
==========================================
  Files          59       60       +1     
  Lines        7643     7710      +67     
==========================================
+ Hits         6575     6638      +63     
- Misses       1068     1072       +4     

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