test_runner: avoid error when coverage line not mappable
Fixes https://github.com/nodejs/node/issues/52775#issuecomment-2131456060
I still need to add some tests for this case where there is coverage for a range outside of the sourcemap
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#issuecomment-2131456060
I still need to add some tests for this case where there is coverage for a range outside of the sourcemap