Revert "feat: install Keycloak Operator"

This reverts commit 405b3a7eee.

platform/keycloak/keycloak.yaml

@@ -1,9 +0,0 @@
-apiVersion: keycloak.org/v1alpha1
-kind: Keycloak
-metadata:
-  name: keycloak
-spec:
-  instances: 1
-  externalAccess:
-    enabled: True
-    host: keycloak.khuedoan.com

platform/keycloak/kustomization.yaml

@@ -1,7 +0,0 @@
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-
-resources:
-  # TODO switch to new operator https://github.com/keycloak/keycloak/tree/main/operator
-  - https://github.com/keycloak/keycloak-operator//deploy?ref=18.0.0
-  - keycloak.yaml