[UCX] Bump Ver + Add CUDA

[ejmeitz]

Updates to 1.20 and updates the script to use more modern binary builder functionality.

I have removed ROCm support. I do not think anyone was using that.

Technically, I think all of the CUDA things could be build dependencies but this is just easier for now. I want something that for sure works. In pricniple UCX is smart enough to be built with everything enabled and silently turn off what it cannot find at runtime.

UCX detects the exiting libraries on the build machine and enables/disables support for various features accordingly. If some of the modules UCX was built with are not found during runtime, they will be
silently disabled.

Figuring this out was too much of a headache right now and I'm pretty sure what I've done here should be good enough. There are builds for each CUDA (x86 only) as well as an ARM and x86 CPU-only build.

[ejmeitz]

@rayegun

[krasow]

I have removed ROCm support. I do not think anyone was using that.

I would double check with AMDGPU.jl folks. As I thought UCX.jl might be leveraged in a backend for Distributed.jl (here). Maybe @jpsamaroo knows updates or if this is a good idea.

[ejmeitz]

@giordano Can we merge this? No one else is actively using UCX. Distributed nor AMDGPU do and UCX.jl has not been updated in 5 years. If updates need to be made down the road for this recipe to work for others then we can make those changes then.

[ejmeitz]

@giordano fixed!