Update models to rename CloudToDeviceMethod and CloudToDeviceMethodResult (#12240)

Author: azabbasi

sdk/iot/Azure.Iot.Hub.Service/api/Azure.Iot.Hub.Service.netstandard2.0.cs

@@ -4,7 +4,7 @@
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
     <EnableApiCompat>false</EnableApiCompat>
     <!-- These supressions should be removed in a production library -->
-    <NoWarn>$(NoWarn);CA1812</NoWarn>
+    <NoWarn>$(NoWarn);CA1812;1591</NoWarn>
   </PropertyGroup>
 
   <!-- Nuget properties -->