Add PC BSA support for Linux tests

- Integrated PC BSA test logic
- Add support for PC BSA Rule P_L1GI_02
- Updated test flow handling for PC BSA

Signed-off-by: Ajayswar S <ajayswar.s@arm.com>
Change-Id: Id08e7412c1973f5a76d7a2680fbb725c48e21fe6