This cl properly parses VkDeviceGroupDeviceCreateInfo,
but only allows the already supported default case.

Fixes all tests in:
dEQP-VK.api.object_management.*.device_group

Bug b/117974925

Change-Id: I42851f10bb9fc94848414bbd09b65ab8b807ae0e
Reviewed-on: https://swiftshader-review.googlesource.com/c/23968Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>