Comment 4 for bug 1991829

I have verified the fix using systemd-container 249.11-0ubuntu3.10 from jammy-proposed:

nr@clean-jammy-amd64:~$ apt-cache policy systemd-container
systemd-container:
  Installed: 249.11-0ubuntu3.10
  Candidate: 249.11-0ubuntu3.10
  Version table:
 *** 249.11-0ubuntu3.10 500
        500 http://archive.ubuntu.com/ubuntu jammy-proposed/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu jammy-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     249.11-0ubuntu3.9 500
        500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
     249.11-0ubuntu3.7 500
        500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
     249.11-0ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages
nr@clean-jammy-amd64:~$ machinectl image-status test
test
            Type: directory
            Path: /var/lib/machines/test
        Hostname: ubuntu
              OS: Ubuntu 22.04.3 LTS
              RO: writable
         Created: Mon 2023-08-28 15:44:25 EDT; 6min ago
nr@clean-jammy-amd64:~$ machinectl read-only test
nr@clean-jammy-amd64:~$ machinectl image-status test
test
            Type: directory
            Path: /var/lib/machines/test
        Hostname: ubuntu
              OS: Ubuntu 22.04.3 LTS
              RO: read-only
         Created: Mon 2023-08-28 15:44:25 EDT; 6min ago
nr@clean-jammy-amd64:~$ machinectl read-only test false
nr@clean-jammy-amd64:~$ machinectl image-status test
test
            Type: directory
            Path: /var/lib/machines/test
        Hostname: ubuntu
              OS: Ubuntu 22.04.3 LTS
              RO: writable
         Created: Mon 2023-08-28 15:44:25 EDT; 8min ago