Reject VIA keys within info.json (#20026)

data/schemas/keyboard.jsonschema

@@ -23,6 +23,7 @@
         }
     },
     "type": "object",
+    "not": { "required": [ "vendorId", "productId" ] }, // reject via keys...
     "properties": {
         "keyboard_name": {"$ref": "qmk.definitions.v1#/text_identifier"},
         "keyboard_folder": {"$ref": "qmk.definitions.v1#/keyboard"},