chore: mark deprecated fields correctly

This change ensures that deprecated CRD fields are properly commented
which make them reported by Go linters.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

.golangci.yml

@@ -9,6 +9,7 @@ linters:
 
 issues:
   exclude-rules:
+  # Disable errcheck linter for test files.
   - path: _test.go
     linters:
     - errcheck
@@ -30,4 +31,4 @@ linters-settings:
       forbid-pkg-errors:
         deny:
         - pkg: "github.com/pkg/errors"
-          dsc: Should be replaced with standard lib errors or fmt.Errorf
+          dsc: Should be replaced with standard lib errors or fmt.Errorf