feat(bigtableadmin): update the API

#### bigtableadmin:v2

The following keys were added:
- schemas.Instance.properties.tags.additionalProperties.type
- schemas.Instance.properties.tags.description
- schemas.Instance.properties.tags.type

Author: yoshi-automation

discovery/bigtableadmin-v2.json

@@ -3168,7 +3168,7 @@
       }
     }
   },
-  "revision": "20250724",
+  "revision": "20250804",
   "rootUrl": "https://bigtableadmin.googleapis.com/",
   "schemas": {
     "AppProfile": {
@@ -4695,6 +4695,13 @@
           "readOnly": true,
           "type": "string"
         },
+        "tags": {
+          "additionalProperties": {
+            "type": "string"
+          },
+          "description": "Optional. Input only. Immutable. Tag keys/values directly bound to this resource. For example: \"123/environment\": \"production\", \"123/costCenter\": \"marketing\" Tags and Labels (above) are both used to bind metadata to resources, with different use-cases. See https://cloud.google.com/resource-manager/docs/tags/tags-overview for an in-depth overview on the difference between tags and labels.",
+          "type": "object"
+        },
         "type": {
           "description": "The type of the instance. Defaults to `PRODUCTION`.",
           "enum": [

src/apis/bigtableadmin/v2.ts

@@ -1254,6 +1254,10 @@ export namespace bigtableadmin_v2 {
      * Output only. The current state of the instance.
      */
     state?: string | null;
+    /**
+     * Optional. Input only. Immutable. Tag keys/values directly bound to this resource. For example: "123/environment": "production", "123/costCenter": "marketing" Tags and Labels (above) are both used to bind metadata to resources, with different use-cases. See https://cloud.google.com/resource-manager/docs/tags/tags-overview for an in-depth overview on the difference between tags and labels.
+     */
+    tags?: {[key: string]: string} | null;
     /**
      * The type of the instance. Defaults to `PRODUCTION`.
      */
@@ -3198,6 +3202,7 @@ export namespace bigtableadmin_v2 {
      *   //   "satisfiesPzi": false,
      *   //   "satisfiesPzs": false,
      *   //   "state": "my_state",
+     *   //   "tags": {},
      *   //   "type": "my_type"
      *   // }
      * }
@@ -3657,6 +3662,7 @@ export namespace bigtableadmin_v2 {
      *       //   "satisfiesPzi": false,
      *       //   "satisfiesPzs": false,
      *       //   "state": "my_state",
+     *       //   "tags": {},
      *       //   "type": "my_type"
      *       // }
      *     },
@@ -4134,6 +4140,7 @@ export namespace bigtableadmin_v2 {
      *       //   "satisfiesPzi": false,
      *       //   "satisfiesPzs": false,
      *       //   "state": "my_state",
+     *       //   "tags": {},
      *       //   "type": "my_type"
      *       // }
      *     },
@@ -4149,6 +4156,7 @@ export namespace bigtableadmin_v2 {
      *   //   "satisfiesPzi": false,
      *   //   "satisfiesPzs": false,
      *   //   "state": "my_state",
+     *   //   "tags": {},
      *   //   "type": "my_type"
      *   // }
      * }