Make printing of MXLinear and MXInferenceLinear more descriptive

[vkuzo]

Summary:

For now, at least print the config. This is useful during feature development. It's pretty verbose, we can make
the string more concise in a future PR.

Test Plan: CI

Reviewers:

Subscribers:

Tasks:

Tags:

[vkuzo]

Stack from ghstack (oldest at bottom):

• -> Make printing of MXLinear and MXInferenceLinear more descriptive #1883
• use torch.float8_e8m0fnu in mx_formats #1882

[pytorch-bot]

🔗 Helpful Links

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❌ 1 New Failure

As of commit 93545a4 with merge base 9ef2f06 ():

NEW FAILURE - The following job has failed:

• Run Float8nocompile Tests / test (SM-89, linux.g6.4xlarge.experimental.nvidia.gpu, --pre torch --index-url https://download.p... / linux-job (gh)
  RuntimeError: Command docker exec -t 79c3c06fa6f545895940b1d43e552f447021ee313de98038a1773534a823249e /exec failed with exit code 1

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[vkuzo]

closing in favor of #1947