feature toggle for using maintenance windows (#3074)

* feature toggle for using maintenance windows

manifests/configmap.yaml

@@ -46,6 +46,7 @@ data:
   enable_ebs_gp3_migration_max_size: "1000"
   enable_init_containers: "true"
   enable_lazy_spilo_upgrade: "false"
+  enable_maintenance_windows: "true"
   enable_master_load_balancer: "false"
   enable_master_pooler_load_balancer: "false"
   enable_password_rotation: "false"

manifests/operatorconfiguration.crd.yaml

@@ -77,6 +77,9 @@ spec:
               enable_lazy_spilo_upgrade:
                 type: boolean
                 default: false
+              enable_maintenance_windows:
+                type: boolean
+                default: true
               enable_pgversion_env_var:
                 type: boolean
                 default: true

manifests/postgresql-operator-default-configuration.yaml

@@ -8,6 +8,7 @@ configuration:
   # crd_categories:
   # - all
   # enable_lazy_spilo_upgrade: false
+  enable_maintenance_windows: true
   enable_pgversion_env_var: true
   # enable_shm_volume: true
   enable_spilo_wal_path_compat: false