feat(firebase): update the api

#### firebase:v1beta1

The following keys were added:
- schemas.OperationMetadata (Total Keys: 2)

Author: yoshi-automation

googleapiclient/discovery_cache/documents/firebase.v1beta1.json

@@ -1320,7 +1320,7 @@
       }
     }
   },
-  "revision": "20230802",
+  "revision": "20230804",
   "rootUrl": "https://firebase.googleapis.com/",
   "schemas": {
     "AddFirebaseRequest": {
@@ -1943,6 +1943,12 @@
       },
       "type": "object"
     },
+    "OperationMetadata": {
+      "description": "Describes the progress of an LRO. It is included in the `metadata` field of the `Operation`.",
+      "id": "OperationMetadata",
+      "properties": {},
+      "type": "object"
+    },
     "ProductMetadata": {
       "description": "Metadata about a long-running Product operation.",
       "id": "ProductMetadata",