GNOME Session Manager 48.0

• The gnome-session script no longer re-runs itself as a subprocess
  
• GNOME OS CI was ported to use a CI template
  
• Integrated new CI-based release process
  
• Fix bugs caused by systemd v257's inhibitor behavior changes
  
• Make gnome-session --version print to stdout rather than syslog
  
• Translation updates
  
• README updates