ci: crnm: review argument metavar and type

Check the arguments to have a consistent definition of metavars to control the
string shown, and have them all lowercase. Also define the types expected on
those arguments.

Signed-off-by: Sergi Blanch-Torne <sergi.blanch.torne@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35828>
1 file changed