Set default True for require_lossless

Signed-off-by: Shah, Karan <karan.shah@intel.com>

Author: MasterSkepticista

openfl/transport/grpc/aggregator_client.py

@@ -349,7 +349,7 @@ def get_tasks(self):
     def get_aggregated_tensors(
         self,
         tensor_keys,
-        require_lossless,
+        require_lossless: bool = True,
     ) -> List[base_pb2.NamedTensor]:
         """
         Get aggregated tensors from the aggregator.