Expose a cache instance from shared.helpers.cache

[Swatinem]

Both api and worker currently have their own modules exporting a cache instance, which at least in API is being misused in some places.

By exposed an ready to use instance directly from shared, it should be harder to misuse.

[codspeed-hq]

CodSpeed Performance Report

Merging #597 will not alter performance

_{Comparing swatinem/cache-instance (4a7e28b) with main (d591317)}

Summary

✅ 9 untouched benchmarks

[codecov-notifications]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.64%. Comparing base (d591317) to head (4a7e28b).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #597      +/-   ##
==========================================
- Coverage   88.64%   88.64%   -0.01%     
==========================================
  Files         464      464              
  Lines       12844    12839       -5     
  Branches     1464     1464              
==========================================
- Hits        11386    11381       -5     
  Misses       1153     1153              
  Partials      305      305              

Flag	Coverage Δ
shared-docker-uploader	88.64% <100.00%> (-0.01%)	⬇️

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