chore: move external abort tests to RAS group

Move external abort tests in the RAS test group as it tests similar
code path which are present in RAS group.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Ibb112c211cd066e02e5a9bfdace7b282287f4a5a
diff --git a/group/tftf-l2-fvp/fvp-ea-ffh,fvp-ea-ffh:fvp-tftf-fip.tftf-aemv8a-debug b/group/tf-l3-boot-tests-ras/fvp-ea-ffh,fvp-ea-ffh:fvp-tftf-fip.tftf-aemv8a-debug
similarity index 100%
rename from group/tftf-l2-fvp/fvp-ea-ffh,fvp-ea-ffh:fvp-tftf-fip.tftf-aemv8a-debug
rename to group/tf-l3-boot-tests-ras/fvp-ea-ffh,fvp-ea-ffh:fvp-tftf-fip.tftf-aemv8a-debug