deps: V8: set correct V8 version patch number
The update to V8 8.6 already included the changes from that version, but it wasn't tagged yet. Having the wrong version in tree breaks node-core-utils.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The update to V8 8.6 already included the changes from that version, but it wasn't tagged yet. Having the wrong version in tree breaks node-core-utils.