Disable flaky vulkan tests. (#11278)

Tracked in #11277

integrations/tensorflow/test/iree_tf_tests/uncategorized/vulkan__broadcast_to.run

diff --git a/integrations/tensorflow/test/iree_tf_tests/uncategorized/vulkan__broadcast_to.run b/integrations/tensorflow/test/iree_tf_tests/uncategorized/vulkan__broadcast_to.run
index 7e35660..62e4a43 100644
--- a/integrations/tensorflow/test/iree_tf_tests/uncategorized/vulkan__broadcast_to.run
+++ b/integrations/tensorflow/test/iree_tf_tests/uncategorized/vulkan__broadcast_to.run
@@ -1,2 +1,3 @@
-# REQUIRES: vulkan
+# REQUIRES: bugfix
+#           TODO(#11277): re-enable after passing
 # RUN: %PYTHON -m iree_tf_tests.uncategorized.broadcast_to_test --target_backends=iree_vulkan --artifacts_dir=%t