lib: add `--no-experimental-global-navigator` CLI flag
Alternative to https://github.com/nodejs/node/pull/50554 and https://github.com/nodejs/node/pull/50412, in the hope we can get consensus on something.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Alternative to https://github.com/nodejs/node/pull/50554 and https://github.com/nodejs/node/pull/50412, in the hope we can get consensus on something.