ENH Layer/model status shows devices now

[BenjaminBossan]

For each adapter, show all the devices of this adapter's parameters.

Also, while working on this, found a very minor bug in VeRA as its linear layer didn't implement its own __repr__.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[BenjaminBossan]

ping @sayakpaul maybe also interesting for diffusers