feat(rme): add SVE Realm tests

Verifies Realm with SVE support. Below tests are added
- Check whether RMI features reports proper SVE VL
- Create SVE Realm and check rdvl result
- Create SVE Realm with invalid VL and check if it fails
- Create SVE Realm and test ID registers
- Create non SVE Realm and test ID registers
- Create SVE Realm and probe all supported VLs
- Check RMM preserves NS ZCR_EL2 register

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: I98a20f34ce72c7c1a353ed13678870168fa27c48
18 files changed