sstate: Allow optimisation of do_deploy_archives task dependencies

do_deploy_archives tasks don't need their dependencies so we can optimistion
this as we do for some other tasks.

Signed-off-by: Jose Quaresma <jose.quaresma@foundries.io>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit 3dd9f6e3)
Signed-off-by: Steve Sakoman <steve@sakoman.com>