feat(firebase)!: update the API

BREAKING CHANGE: This release has breaking changes.

#### firebase:v1beta1

The following keys were deleted:
- schemas.MessageSet.description

Author: yoshi-automation

discovery/firebase-v1beta1.json

@@ -1324,7 +1324,7 @@
       }
     }
   },
-  "revision": "20250303",
+  "revision": "20250314",
   "rootUrl": "https://firebase.googleapis.com/",
   "schemas": {
     "AddFirebaseRequest": {
@@ -1919,7 +1919,6 @@
       "type": "object"
     },
     "MessageSet": {
-      "description": "This is proto2's version of MessageSet.",
       "id": "MessageSet",
       "properties": {},
       "type": "object"

src/apis/firebase/v1beta1.ts

@@ -504,9 +504,6 @@ export namespace firebase_v1beta1 {
      */
     type?: string | null;
   }
-  /**
-   * This is proto2's version of MessageSet.
-   */
   export interface Schema$MessageSet {}
   /**
    * This resource represents a long-running operation that is the result of a network API call.