boostrap: remove sudo as root user
boostrap: remove sudo as root user

If the user is root, no need for sudo
with package manager.

Part-of: <https://gitlab.freedesktop.org/gstreamer/cerbero/-/merge_requests/738>

nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero