Spack now has a large CI framework in GitLab for PR testing and public binary generation. We should take advantage of this to test and distribute optimized binaries for popular ML frameworks.

We would like to test CPU, CUDA, and ROCm builds on the following platforms:

• Linux x86_64: Add CI stack for ML packages #31592
• Linux aarch64: ML CI: Linux aarch64 #39666
• Linux ppc64le: ML CI: add ppc64le pipelines #47441
• macOS x86_64
• macOS aarch64: Add macOS ML CI stacks #36586
• Windows?