related:

• Added support for AMD GPUs in "docker run --gpus". #49952
• Remove support for specifying nvidia driver capabilities in --gpus flag #50099

With initial support for AMD GPUs implemented in #49952, we need to look at re-implementing GPU support through CDI.

The goal is to keep --gpu available for the foreseeable future as a "porcelain", easy-to-use option, but to swap the implementation for a CDI-based solution. Some of the advanced, but unused (or very little used) features provided through --gpus would not be supported in that implementation, so should be phased out (see #50099).

• Initially, this could be an opt-in (e.g., --feature cdi-gpu-support)
• ultimately for this to become the default (with opt-out as first step)