Use standalone.xml config file when only using 1 replica (#9112)

* fixes #7679, fixes #9070

Signed-off-by: Michael Dop <michael.p.dop@gmail.com>

stable/keycloak/Chart.yaml

@@ -1,5 +1,5 @@
 name: keycloak
-version: 4.0.1
+version: 4.0.2
 appVersion: 4.5.0.Final
 description: Open Source Identity and Access Management For Modern Applications and Services
 keywords:

stable/keycloak/templates/configmap.yaml

@@ -21,7 +21,7 @@ data:
 {{ . | indent 4 }}
   {{- end }}
 
-    exec /opt/jboss/tools/docker-entrypoint.sh -b 0.0.0.0 {{ .Values.keycloak.extraArgs }}{{- if $highAvailability }} -c standalone-ha.xml{{ end }}
+    exec /opt/jboss/tools/docker-entrypoint.sh -b 0.0.0.0 {{ .Values.keycloak.extraArgs }}{{- if $highAvailability }} -c standalone-ha.xml{{ else }} -c standalone.xml{{ end }}
     exit "$?"
 
   keycloak.cli: |