feat: simplify crash reporting test

Crash reporting test was unnecessarily using RAS to generate SError and
printing lower ELs crash report. This can be easily achieved by simply
causing an SError in lower EL and trap it to EL3.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Idec626060ed672e7a5036883e7a3529cfd50c769
6 files changed