Add explicit dependencies so that google_composer_environment is created after IAM resources in acceptance test (#9610) (#6769)

[upstream:fc162b9af6ee82b2a473286109bcfeb8acdf5bce]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/9610.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

google-beta/services/composer/resource_composer_environment_test.go

@@ -2590,6 +2590,7 @@ resource "google_composer_environment" "test" {
       service_account = google_service_account.test.name
     }
   }
+  depends_on = [google_project_iam_member.composer-worker]
 }
 
 // use a separate network to avoid conflicts with other tests running in parallel
@@ -2665,6 +2666,7 @@ resource "google_composer_environment" "test" {
       service_account = google_service_account.test.name
     }
   }
+  depends_on = [google_project_iam_member.composer-worker]
 }
 
 // use a separate network to avoid conflicts with other tests running in parallel