os_release eol tests: skip on CANNED, skip match check on rawhide
    
    these don't work correctly on IoT. Let's just skip them - testing
    on the main release should be sufficient. Let's not do the EOL
    consistency check on Rawhide, as Rawhide EOL is a pretty notional
    concept. They don't line up ATM and I'm not sure we want to spend
    too much time trying to make them line up. Let's just focus on
    Branched.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>