modules: hal_nordic: rework resource reservations

The resource reservation definitions were moved to a separate header
file.

The PPIB and DPPI channel and group resources can now be statically
allocated for each individual instance.

Signed-off-by: Rafał Kuźnia <[email protected]>
(cherry picked from commit 89d2be1db04c2d29aaa8c75dcf4ea600747291f6)
Signed-off-by: Rafał Kuźnia <[email protected]>

Author: e-rk