feat: add throughput_mode to UpdateDatabaseDdlRequest to be used by Spanner Migration Tool. See https://github.com/GoogleCloudPlatform/spanner-migration-tool (#2304)

* feat: add throughput_mode to UpdateDatabaseDdlRequest to be used by Spanner Migration Tool. See https://github.com/GoogleCloudPlatform/spanner-migration-tool

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Source-Link: googleapis/googleapis@cbc536a

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protos/google/spanner/admin/database/v1/spanner_database_admin.proto

@@ -813,6 +813,11 @@ message UpdateDatabaseDdlRequest {
   // For more details, see protobuffer [self
   // description](https://developers.google.com/protocol-buffers/docs/techniques#self-description).
   bytes proto_descriptors = 4 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. This field is exposed to be used by the Spanner Migration Tool.
+  // For more details, see
+  // [SMT](https://github.com/GoogleCloudPlatform/spanner-migration-tool).
+  bool throughput_mode = 5 [(google.api.field_behavior) = OPTIONAL];
 }
 
 // Action information extracted from a DDL statement. This proto is used to

protos/protos.d.ts

@@ -2814,6 +2814,10 @@ export class DatabaseAdminClient {
    *   ```
    *   For more details, see protobuffer [self
    *   description](https://developers.google.com/protocol-buffers/docs/techniques#self-description).
+   * @param {boolean} [request.throughputMode]
+   *   Optional. This field is exposed to be used by the Spanner Migration Tool.
+   *   For more details, see
+   *   [SMT](https://github.com/GoogleCloudPlatform/spanner-migration-tool).
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Promise} - The promise which resolves to an array.