feat: allow listing keys in kv stores

[jyecusch]

Also supports key prefix filtering

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.27%. Comparing base (d7f3ff0) to head (da1e896).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #592      +/-   ##
==========================================
+ Coverage   49.19%   49.27%   +0.07%     
==========================================
  Files          23       23              
  Lines        3226     3229       +3     
==========================================
+ Hits         1587     1591       +4     
  Misses       1535     1535              
+ Partials      104      103       -1     

Flag	Coverage Δ
aws	43.82% <ø> (+0.07%)	⬆️
azure	53.29% <ø> (ø)
core	78.87% <100.00%> (+0.30%)	⬆️
gcp	47.17% <ø> (ø)

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