Support Vulkan version from command line arguments

[llvm-beanz]

The code currently configures Vulkan 1.1 devices because you need to setup the API version before you can query for devices so I just picked the lowest.

An incoming PR will change this to setup a 1.1 then query the device and recreate the instance and device for whatever is supported. This works around issues where Vulkan 1.3 is currently required by clang shaders. We should instead take this value from the command line.