fix: write Helm CA cert to disk

[TylerGillson]

No description provided.

[codecov]

Codecov Report

Merging #169 (1e209e4) into main (7792867) will decrease coverage by 0.27%.
The diff coverage is 37.50%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #169      +/-   ##
==========================================
- Coverage   56.69%   56.42%   -0.27%     
==========================================
  Files           9        9              
  Lines         889      895       +6     
==========================================
+ Hits          504      505       +1     
- Misses        357      361       +4     
- Partials       28       29       +1     

Files	Coverage Δ
internal/controller/validatorconfig_controller.go	75.75% <37.50%> (-1.38%)	⬇️

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