Add description to owned customresources

[eguzki]

What

Addressing warning from redhat-openshift-ecosystem/community-operators-prod#5278 (comment)

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.38%. Comparing base (4241531) to head (29ad80f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #167   +/-   ##
=======================================
  Coverage   84.38%   84.38%           
=======================================
  Files          18       18           
  Lines         967      967           
=======================================
  Hits          816      816           
  Misses        100      100           
  Partials       51       51           

Flag	Coverage Δ
integration	78.59% <ø> (ø)
unit	65.14% <ø> (ø)

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Components	Coverage Δ
api/v1alpha1 (u)	100.00% <ø> (ø)
pkg/helpers (u)	80.64% <ø> (ø)
pkg/log (u)	94.73% <ø> (ø)
pkg/reconcilers (u)	73.52% <ø> (ø)
pkg/limitador (u)	98.11% <ø> (ø)
controllers (i)	75.25% <ø> (ø)
pkg/upgrades	∅ <ø> (∅)