gnome-session wrapper: Avoid running as a subprocess The gnome-settings-daemon 47.x test suite runs gnome-session as a captive subprocess, terminating it after testing. If the gnome-session wrapper script re-runs itself as a subprocess, then the subprocess will eventually exec the actual gnome-session binary, but the parent will continue to run.
This results in the g-s-d test suite eventually terminating the parent but not the child, which breaks test suite assumptions for later tests (which expect to get a new instance of gnome-session every time).
See https://gitlab.gnome.org/GNOME/gnome-settings-daemon/-/merge_requests/384
