feat(testing): update the API

#### testing:v1

The following keys were added:
- schemas.LabInfo.properties.regionCode.description
- schemas.LabInfo.properties.regionCode.type

Author: yoshi-automation

discovery/testing-v1.json

@@ -449,7 +449,7 @@
       }
     }
   },
-  "revision": "20241231",
+  "revision": "20250304",
   "rootUrl": "https://testing.googleapis.com/",
   "schemas": {
     "Account": {
@@ -1723,6 +1723,10 @@
         "name": {
           "description": "Lab name where the device is hosted. If empty, the device is hosted in a Google owned lab.",
           "type": "string"
+        },
+        "regionCode": {
+          "description": "The Unicode country/region code (CLDR) of the lab where the device is hosted. E.g. \"US\" for United States, \"CH\" for Switzerland.",
+          "type": "string"
         }
       },
       "type": "object"

src/apis/testing/v1.ts

@@ -1018,6 +1018,10 @@ export namespace testing_v1 {
      * Lab name where the device is hosted. If empty, the device is hosted in a Google owned lab.
      */
     name?: string | null;
+    /**
+     * The Unicode country/region code (CLDR) of the lab where the device is hosted. E.g. "US" for United States, "CH" for Switzerland.
+     */
+    regionCode?: string | null;
   }
   /**
    * Specifies an intent that starts the main launcher activity.