Move I[Module]Service to Shared

Relocate the I[Module]Service interface from the client Services file to a new Shared/Interfaces/I[Module]Service.cs so the interface becomes a shared contract. Remove the duplicate interface from the client-side [Module]Service implementation.
It was move in error, release 6.1.5 PR add a new Visual Studio Project Template #5493

Oqtane.Server/wwwroot/Modules/Templates/External/Shared/Interfaces/I[Module]Service.cs

@@ -0,0 +1,18 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace [Owner].Module.[Module].Services
+{
+    public interface I[Module]Service 
+    {
+        Task<List<Models.[Module]>> Get[Module]sAsync(int ModuleId);
+
+        Task<Models.[Module]> Get[Module]Async(int [Module]Id, int ModuleId);
+
+        Task<Models.[Module]> Add[Module]Async(Models.[Module] [Module]);
+
+        Task<Models.[Module]> Update[Module]Async(Models.[Module] [Module]);
+
+        Task Delete[Module]Async(int [Module]Id, int ModuleId);
+    }
+}