Remove grpc msg send/receive limit (#1769)

Author: RobertLucian

pkg/cortex/serve/cortex_internal/lib/model/tfs.py

@@ -113,7 +113,13 @@ def __init__(self, address: str):
             {}
         )  # maps the model ID to the model metadata (signature def, signature key and so on)
 
-        self.channel = grpc.insecure_channel(self.address)
+        # remove limit for maximum/receive transmission sizes
+        options = [
+            ("grpc.max_send_message_length", -1),
+            ("grpc.max_receive_message_length", -1),
+        ]
+        self.channel = grpc.insecure_channel(self.address, options=options)
+
         self._service = model_service_pb2_grpc.ModelServiceStub(self.channel)
         self._pred = prediction_service_pb2_grpc.PredictionServiceStub(self.channel)