test_runner: avoid error when coverage line not found
Fixes: https://github.com/nodejs/node/issues/52775
the coverage in this case is pretty useless, but it wont throw after this fix
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes: https://github.com/nodejs/node/issues/52775
the coverage in this case is pretty useless, but it wont throw after this fix