feat(ras): introduce RAS KFH support test

Introduce a test to verify Kernel first handling of RAS errors.
Error is injected and handled in tftf, there is no EL3 involvement.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Iaf93247647bf8b749cba5ea42fd819dee675b04b
3 files changed