tests: ztests: error_hook: Fix for Armv8R aarch64

Fix the trigger_fault_access. The fix is similar to cortex m.
Fix the trigger_fault_divide_zero. The fix is similar to qemu, i.e.
skip this testcase, because FVP would not trigger the exception for
dividing zero either.

Signed-off-by: Jaxson Han <jaxson.han@arm.com>