[#1] Add presentation layer

Signed-off-by: Ivan Pchelintsev <i.pchelintsev@yadro.com>

sdk/src/FrostFS.SDK.ClientV2/Services/Session.cs

@@ -1,4 +1,5 @@
 using FrostFS.Refs;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.ModelsV2;
 using FrostFS.Session;
 using Google.Protobuf;
@@ -13,10 +14,7 @@ public partial class Client
         {
             Body = new CreateRequest.Types.Body
             {
-                OwnerId = new OwnerID
-                {
-                    Value = ByteString.CopyFrom(OwnerId.FromKey(_key).ToHash())
-                },
+                OwnerId = _owner.ToGrpcMessage(),
                 Expiration = expiration,
             }
         };