feat: kubernetes keycloak deployment strategy (#17304)

* feat: kubernetes keycloak deployment strategy

Allow to set the deployment strategy, the default RollingUpdate fail
if multiattach is not supported by volumes

Signed-off-by: Jean-François Monnier <kessler.dev@gmail.com>

* Update deploy/kubernetes/helm/che/custom-charts/che-keycloak/values.yaml

Signed-off-by: Jean-François Monnier <kessler.dev@gmail.com>
Co-authored-by: Serhii Leshchenko <sleshche@redhat.com>

Co-authored-by: Serhii Leshchenko <sleshche@redhat.com>

deploy/kubernetes/helm/che/custom-charts/che-keycloak/templates/deployment.yaml

@@ -21,6 +21,8 @@ spec:
     matchLabels:
       app: che
       component: keycloak
+  strategy:
+    type: {{ .Values.deploymentStrategy }}
   template:
     metadata:
       labels:

deploy/kubernetes/helm/che/custom-charts/che-keycloak/values.yaml

@@ -15,3 +15,4 @@ image: quay.io/eclipse/che-keycloak:nightly
 requireAdminPasswordChange: true
 keycloakAdminUserName: admin
 keycloakAdminUserPassword: admin
+deploymentStrategy: RollingUpdate