Async refactoring of the code. Initial

src/common/method_wrappers/Decorator.py

src/common/tools/service/GenericGrpcServiceAsync.py

src/dlt/connector/client/DltConnectorClient.py

src/dlt/connector/client/DltConnectorClientSync.py

src/dlt/connector/client/DltEventsCollector.py

src/dlt/connector/client/DltGatewayClient.py

src/dlt/connector/client/DltGatewayClientEvent.py

src/dlt/connector/service/DltConnectorService.py

src/dlt/connector/service/DltConnectorServiceServicerImpl.py

src/dlt/connector/service/__main__.py

.../connector/service/event_dispatcher/DltEventDispatcher.py

...nterdomain/service/topology_abstractor/DltRecordSender.py

src/interdomain/service/topology_abstractor/DltRecorder.py