Remove Environment dotnet in favor of new app addin SystemEnvironment (#2893)

#### Summary 
Retire System.Environment in favor of new app addin SystemEnvironment

#### Work Item(s) 
Fixes
[AB#564815](https://dynamicssmb2.visualstudio.com/1fcb79e7-ab07-432a-a3c6-6cf5a88ba4a5/_workitems/edit/564815)

Author: onbuyuka

src/System Application/App/DotNet Aliases/src/dotnet.al

@@ -849,6 +849,16 @@ dotnet
         }
     }
 
+    assembly("Microsoft.Dynamics.Nav.SystemEnvironment")
+    {
+        Culture = 'neutral';
+        PublicKeyToken = '31bf3856ad364e35';
+
+        type("Microsoft.Dynamics.Nav.SystemEnvironment.SystemEnvironment"; "SystemEnvironment")
+        {
+        }
+    }
+
     assembly("Microsoft.Dynamics.Nav.Timer")
     {
         Culture = 'neutral';
@@ -1436,10 +1446,6 @@ dotnet
         {
         }
 
-        type("System.Environment"; "Environment")
-        {
-        }
-
         type("System.EventArgs"; "EventArgs")
         {
         }