We now use hwmv2 to list boards instead of relying on twister specific
config files.
One yaml files (twister.yaml for now) will have all the data needed for
all possible targets and variations of a board reusing most of the data
where possible and variations can override the top level data.
Twister keeps track of 'aliases' of boards and identifies that for
example native_sim is the same as native_sim/native, so either names
will be possible in both test yaml files or on the command line,
however, the reporting will always use the full name, so no there is no
confusion about what is being tested/built.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>