Moving from Go module v4 to v5 prepares us for public releases.
Move done using gomove [1] as with the v3 and v4 moves.
[1] https://github.com/KSubedi/gomove
Signed-off-by: Matt Heon <mheon@redhat.com>
Move SupportedVersion() and IsLibpodRequest() to separate package to
avoid import cycle when using it in libpod.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
