test: fix `parallel/test-dgram-udp6-link-local-address`
Since #41431 landed, this test is always skipped because family
is now an integer, not a string anymore.
Thanks @bl-ue for the report.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Since #41431 landed, this test is always skipped because family
is now an integer, not a string anymore.
Thanks @bl-ue for the report.