Fix bug where ReplicationRoles was exposing unsupported roles (Azure#23294)

* Fix bug where ReplicationRoles was exposing unsupported roles

* Remove unsupported ReplicationRole from api version 2022-03-08-preview

Author: ambrahma

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/preview/2022-03-08-preview/FlexibleServers.json

@@ -817,11 +817,7 @@
       "enum": [
         "None",
         "Primary",
-        "Secondary",
-        "WalReplica",
-        "SyncReplica",
         "AsyncReplica",
-        "GeoSyncReplica",
         "GeoAsyncReplica"
       ],
       "x-ms-enum": {

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/stable/2022-12-01/FlexibleServers.json

@@ -838,11 +838,7 @@
       "enum": [
         "None",
         "Primary",
-        "Secondary",
-        "WalReplica",
-        "SyncReplica",
         "AsyncReplica",
-        "GeoSyncReplica",
         "GeoAsyncReplica"
       ],
       "x-ms-enum": {