homectl: Add test coverage for homectl
    
    Add test coverage for SELinux AVC issues related to systemd-homed
    service. The homectl program calls the systemd-homed service, which is
    not yet confined, but it triggers SELinux denials. This test suite
    provides coverage for command homectl along with its subcommands and
    checks for avc denials.
    
    Signed-off-by: Amith Kumar <apeetham@redhat.com>