feat(secret): add ephemeral policy configuration

[Codelax]

Closes #2622

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 77.14286% with 8 lines in your changes missing coverage. Please review.

Project coverage is 71.02%. Comparing base (fe86049) to head (4d840c6).
Report is 141 commits behind head on master.

Files	Patch %	Lines
internal/services/secret/helpers.go	83.33%	2 Missing and 2 partials ⚠️
internal/services/secret/secret.go	63.63%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2691      +/-   ##
==========================================
- Coverage   71.43%   71.02%   -0.41%     
==========================================
  Files         277      334      +57     
  Lines       35875    33557    -2318     
==========================================
- Hits        25628    23835    -1793     
+ Misses       8028     7404     -624     
- Partials     2219     2318      +99     

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