Provide liveness probe for CRD and config (#3089)

* add LivenessProbe to both CRDs 
* auto-generate liveness probe for CRD
* update topolgySpreadConstraint schema validation
* Disable it for config map

manifests/postgresql-operator-default-configuration.yaml

@@ -87,6 +87,16 @@ configuration:
     # inherited_labels:
     # - application
     # - environment
+    # liveness_probe:
+    #   httpGet:
+    #     scheme: HTTP
+    #     path: /liveness
+    #     port: 8008
+    #   initialDelaySeconds: 10
+    #   periodSeconds: 10
+    #   timeoutSeconds: 5
+    #   successThreshold: 1
+    #   failureThreshold: 3
     master_pod_move_timeout: 20m
     # node_readiness_label:
     #   status: ready