feat: add airflow_byoid_uri field to Cloud Composer API

PiperOrigin-RevId: 527102116

google/cloud/orchestration/airflow/service/v1/environments.proto

@@ -458,6 +458,13 @@ message EnvironmentConfig {
   // interface](/composer/docs/how-to/accessing/airflow-web-interface)).
   string airflow_uri = 6;
 
+  // Output only. The 'bring your own identity' variant of the URI of the Apache
+  // Airflow Web UI hosted within this environment, to be accessed with external
+  // identities using workforce identity federation (see [Access environments
+  // with workforce identity
+  // federation](/composer/docs/composer-2/access-environments-with-workforce-identity-federation)).
+  string airflow_byoid_uri = 20 [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // Optional. The configuration options for GKE cluster master authorized
   // networks. By default master authorized networks feature is:
   // - in case of private environment: enabled with no external networks