transformers

fb7fca71 - [trainer metrics] fix cpu mem metrics; reformat runtime metric (#10937)

[trainer metrics] fix cpu mem metrics; reformat runtime metric (#10937) * fix cpu mem metrics; reformat runtime metric * adjust dependency * extend docs * soft dependency * cleanup * fix the runtime metric issue * restore * move docs, cross reference from 2 places, improve * Apply suggestions from code review Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>