anv: Use intel_device_info memory alignment

It was also necessary to initialize mem_alignment in the tests
otherwise vma allocation would fail with stubs.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21972>

src/intel/vulkan/tests/state_pool_padding.c

@@ -30,6 +30,7 @@ int main(void)
    struct anv_device device = {};
    struct anv_state_pool state_pool;
 
+   test_device_info_init(&physical_device.info);
    anv_device_set_physical(&device, &physical_device);
    device.kmd_backend = anv_kmd_backend_get(INTEL_KMD_TYPE_STUB);
    pthread_mutex_init(&device.mutex, NULL);