Changes to Get registered nodes

removed subschema #2 from the registered_nodes/items/service_endpoints/items response property allOf list for the response status 200

the response property registered_nodes/items/service_endpoints/items/general_service became required for the status 200

the response property registered_nodes/items/service_endpoints/items/mirror_node became required for the status 200

the response property registered_nodes/items/service_endpoints/items/rpc_relay became required for the status 200

added the required property registered_nodes/items/service_endpoints/items/block_node to the response with the 200 status

endpoint added

api path removed without deprecation