feat(hc): Split db tests with new overrides

[dashed]

Run split db tests with new overrides: get_from_cache() and get_many_from_cache().

[codecov]

Codecov Report

Merging #54754 (ad3bf32) into master (425e95f) will decrease coverage by 0.08%.
Report is 11 commits behind head on master.
The diff coverage is 34.10%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #54754      +/-   ##
==========================================
- Coverage   79.84%   79.76%   -0.08%     
==========================================
  Files        5019     5019              
  Lines      213419   213548     +129     
  Branches    36331    36336       +5     
==========================================
- Hits       170396   170341      -55     
- Misses      37781    37971     +190     
+ Partials     5242     5236       -6     

Files Changed	Coverage Δ
src/sentry/db/models/manager/base.py	76.25% <ø> (ø)
.../issueDetails/groupReplays/useReplaysFromIssue.tsx	100.00% <ø> (ø)
...y/transactionReplays/useReplaysFromTransaction.tsx	84.21% <ø> (ø)
src/sentry/testutils/helpers/backups.py	35.89% <33.59%> (-61.12%)	⬇️
src/sentry/incidents/models.py	97.61% <100.00%> (+<0.01%)	⬆️

... and 19 files with indirect coverage changes