Configs: Separate S1/B1 NSOFF configs into separate groups

Have musca_b1 and musca_s1 for S+NS configuration groups, and
musca_b1_nsoff and musca_s1_nsoff with NSOFF configurations.
The latter have problems with artefacts currently not being
correctly available in CI so they need some more work in the
CI scripts to be runnable.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I7a1af1a1c3e909e34616f437749da7c9476c9aca
1 file changed