fix(@angular/cli): allow configuration option in ng deploy

Fixes #17613

(cherry picked from commit 57bc38e)

Author: alan-agius4

packages/angular/cli/commands/deploy.json

@@ -18,17 +18,16 @@
             "$source": "argv",
             "index": 0
           }
+        },
+        "configuration": {
+          "description": "A named build target, as specified in the \"configurations\" section of angular.json.\nEach named target is accompanied by a configuration of option defaults for that target.",
+          "type": "string",
+          "aliases": [
+            "c"
+          ]
         }
       },
-      "configuration": {
-        "description": "A named build target, as specified in the \"configurations\" section of angular.json.\nEach named target is accompanied by a configuration of option defaults for that target.",
-        "type": "string",
-        "aliases": [
-          "c"
-        ]
-      },
-      "required": [
-      ]
+      "required": []
     },
     {
       "$ref": "./definitions.json#/definitions/base"