feat: Option in Values.yaml to set scratch PV size

[dan-fernandes]

Implements #1404

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.15%. Comparing base (c1ef2a6) to head (5a184e6).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1405   +/-   ##
=======================================
  Coverage   95.15%   95.15%           
=======================================
  Files          43       43           
  Lines        3014     3014           
=======================================
  Hits         2868     2868           
  Misses        146      146           

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