feat: make large object disk cache use the high region ids

[MrCroxx]

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

As title.

This PR is for multiple engines sharing the same device.

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)

#596

[codecov]

Codecov Report

Attention: Patch coverage is 53.84615% with 12 lines in your changes missing coverage. Please review.

Project coverage is 82.45%. Comparing base (034032f) to head (507614b).

Files	Patch %	Lines
foyer-storage/src/store.rs	29.41%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #610      +/-   ##
==========================================
- Coverage   82.48%   82.45%   -0.03%     
==========================================
  Files          62       62              
  Lines        8037     8053      +16     
==========================================
+ Hits         6629     6640      +11     
- Misses       1408     1413       +5     

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