Align KeycloakClient Resource Secret Reference in Argo CD

[Artem-Zahumonnyi]

Describe the bug
The KeycloakClient resources experience a discrepancy in Argo CD between the declared secret and the secret after Custom Resource (CR) modifications. Specifically, a declared secret like "secret: keycloak-client-nexus-secret" is automatically changed to "secret: '$keycloak-client-nexus-secret:clientSecret'" upon deployment, causing a diff in Argo CD.

To Reproduce

What did you do?

Deployed a KeycloakClient resource through Argo CD with the secret field defined as:

secret: keycloak-client-nexus-secret

What did you expect to see?

I expected the KeycloakClient resource to maintain the declared secret reference without automatic modifications.

What did you see instead? Under which circumstances?

After deployment through Argo CD, the CR modifies the secret reference to:

secret: '$keycloak-client-nexus-secret:clientSecret'

This change causes a persistent diff in Argo CD, indicating a discrepancy between the declared and live states.