Admission webhook rejects valid secretRef ManagementContext

[joeclarkpodium]

Describe the bug

Since GKO v4.5.0 and the addition of new admission webhook, valid secretRef ManagementContexts now get rejected.

To Reproduce

Steps to reproduce the behaviour:

1. Attempt to create a valid Secret and secretRef ManagementContext resource, using a valid bearer token for the APIM instance, for example:

   apiVersion: v1
   kind: Secret
   metadata:
   name: mgmt-ctx-secret
   type: Opaque
   data:
   bearerToken: YmFzZTY0LWVuY29kZWQtc3RyaW5n
   ---
   apiVersion: gravitee.io/v1alpha1
   kind: ManagementContext
   metadata:
   name: example-context
   spec:
   baseUrl: http://example-apim-deployment:83
   environmentId: DEFAULT
   organizationId: DEFAULT
   auth:
   secretRef:
     name: mgmt-ctx-secret

Expected behaviour

The resource is created.

Current behaviour

The resource is rejected by the admission webhook with the error bad credentials for context.

Environment

What is the impacted version? 4.5.0