feat: cluster resources namespace

[fuskovic]

Deprecates CLUSTER_SECRETS_NAMESPACE in favor of new CLUSTER_RESOURCES_NAMESPACE.

Related to: #4778

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[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.07%. Comparing base (f1e86a3) to head (500f44c).

Files with missing lines	Patch %	Lines
pkg/server/delete_cluster_secret_v1alpha1.go	0.00%	4 Missing ⚠️
pkg/server/list_cluster_secrets_v1alpha1.go	25.00%	2 Missing and 1 partial ⚠️
pkg/server/update_cluster_secret_v1alpha1.go	25.00%	2 Missing and 1 partial ⚠️
pkg/webhook/external/config.go	0.00%	2 Missing ⚠️
pkg/server/config/config.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5433   +/-   ##
=======================================
  Coverage   55.07%   55.07%           
=======================================
  Files         426      426           
  Lines       31487    31487           
=======================================
  Hits        17342    17342           
  Misses      13145    13145           
  Partials     1000     1000           

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[Plork]

When doing this is it maybe possible to add annotations to the namespace? In case of permitted regex for for example external-secrets.

          external-secrets.io/allowed-secret-store: ""
          external-secrets.io/permitted-key-regex: ""

When creating the namespace it would help if we can provide these.