build: set "clang" in config.gypi in GN build
Update the GN build's handling of config.gypi
to match the behavior in https://github.com/nodejs/node/pull/52873.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Update the GN build's handling of config.gypi
to match the behavior in https://github.com/nodejs/node/pull/52873.