fix(perm): allow for GETs when secrets are disabled

[ecrupper]

A firm hand is not really necessary here for GETs. Platform admins could delete secrets if they want to. This change will let transitions be easier if secrets already exist.

[codecov]

Codecov Report

❌ Patch coverage is 11.76471% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.25%. Comparing base (76b266c) to head (25ef95b).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
router/middleware/perm/perm.go	11.76%	14 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1406      +/-   ##
==========================================
- Coverage   58.25%   58.25%   -0.01%     
==========================================
  Files         660      660              
  Lines       25285    25286       +1     
==========================================
  Hits        14730    14730              
- Misses       9868     9872       +4     
+ Partials      687      684       -3     

Files with missing lines	Coverage Δ
router/middleware/perm/perm.go	59.07% <11.76%> (-0.19%)	⬇️

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