Fix Vulkan offload test suite setup to allow for wave size specification #611
Description
Right now, Vulkan ignores the specified WaveSize attribute in the HLSL.
In the device creation code, there is no mention of VK_EXT_subgroup_size_control to set the wave size based on the attribute in the HLSL.
So, when Vulkan is the IR target, the device will just use the default wave size.
This issue tracks updating the test infrastructure so that the wave size specified in the HLSL is properly referenced, or an error is raised if the device doesn't support it.