Add SME/SME2 support for FVP image in CI

Update Linux Kernel and bootloader-wrapper to versions supporting SME/SME2.
This required to properly handle context switch with SME state preservation
and restoration. Also address CPU boot issue by keep in sync number of CPUs
used in bootloader/DTS and FVP configuration. Two CPUs used when first used
for running system services and second one as isolated to run test programs.

Linux Kernel: 6.16-rc2 (update to released version once available)
Bootloader wrapper: latest available

Signed-off-by: Anton Bondarenko <anton.bondarenko@arm.com>

Approved-by: Jakub Sujak <jakub.sujak@arm.com>