tests/functional/test_aarch64_xlnx_versal: test the versal2 machine

tests/functional/test_aarch64_xlnx_versal: test the versal2 machine

Add a test for the amd-versal2-virt machine using the same command line,
kernel, initrd than the ones used for amd-versal-virt.

Signed-off-by: Luc Michel <luc.michel@amd.com>
Reviewed-by: Francisco Iglesias <francisco.iglesias@amd.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250926070806.292065-48-luc.michel@amd.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>