top level name can be 64 char long (#11692)

Author: datr93

specification/desktopvirtualization/resource-manager/Microsoft.DesktopVirtualization/preview/2020-11-02-preview/desktopvirtualization.json

@@ -3700,7 +3700,7 @@
       "required": true,
       "type": "string",
       "description": "The name of the host pool within the specified resource group",
-      "maxLength": 24,
+      "maxLength": 64,
       "minLength": 3,
       "x-ms-parameter-location": "method"
     },
@@ -3720,7 +3720,7 @@
       "required": true,
       "type": "string",
       "description": "The name of the application group",
-      "maxLength": 24,
+      "maxLength": 64,
       "minLength": 3,
       "x-ms-parameter-location": "method"
     },
@@ -3750,7 +3750,7 @@
       "required": true,
       "type": "string",
       "description": "The name of the workspace",
-      "maxLength": 24,
+      "maxLength": 64,
       "minLength": 3,
       "x-ms-parameter-location": "method"
     },