K8SPG-704: Add create replica methods

Author: egegunes

charts/pg-db/templates/cluster.yaml

@@ -518,6 +518,10 @@ spec:
       targetInstance: {{ .Values.patroni.switchover.targetInstance }}
       {{- end }}
     {{- end }}
+    {{- if .Values.patroni.createReplicaMethods }}
+    createReplicaMethods:
+{{ .Values.patroni.createReplicaMethods | toYaml | indent 6 }}
+    {{- end }}
 {{- end }}
 
 {{- if .Values.extensions }}

charts/pg-db/values.yaml

@@ -515,6 +515,9 @@ pmm:
 #   switchover:
 #     enabled: "true"
 #     targetInstance: ""
+#   createReplicaMethods:
+#   - pgbackrest
+#   - basebackup
 
 # extensions:
 #   image: percona/percona-postgresql-operator:2.6.0