Currently we are using different styles and amount of digits for the
provisioning script prefixes. This change will unify them across the
platforms. Also removes a couple of duplicate files.

Task-number: QTQAINFRA-1668
Change-Id: I039777e7616bccc29c6a4ac55db13326ae8dc87c
Reviewed-by: Joni Jäntti <joni.jantti@qt.io>
Reviewed-by: Simo Fält <simo.falt@qt.io>