color: split alpha mode into its own request

There is no need to couple it to the set_color_space request since we
get atomicity via the surface.commit mechanism.
set_extended_dynamic_range already has its own request so keep it
uniform.

Signed-off-by: Sebastian Wick <sebastian@sebastianwick.net>
2 jobs for color-alpha-request in 52 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Containers Build
passed #5860841
container_build

00:00:11

 
  Test
passed #5860842
test

00:00:41