Updates for Lux 0.5 support

[avik-pal]

No description provided.

[andreuvall]

I am trying to use Boltz to work with pretrained ResNets in Lux. Why is it that they were removed? I have uncommented lines in Artifacts.toml and have been able to initialize a pretrained resnet18 and a pretrained resnet50, apparently without errors. Any advice or note of caution using these models?

[avik-pal]

It was removed because of the failures in https://buildkite.com/julialang/boltz-dot-jl/builds/55 (which tbh were quite surprising). Can you open a PR with the lines uncommented and see if the CI passes?

[andreuvall]

I opened #17. If I understand correctly, the CI is running now.

[andreuvall]

Checks were running well, but then there is one which I don't seem to have the rights to run. See #17.

[andreuvall]

I found a problem, although I don't know if this is what was making the check fail. I filed issue #18 reporting about it.