[docs] Update CPU/GPU inference docs (#26881)
* first draft
* remove non-existent paths
* edits
* feedback
* feedback and optimum
* Apply suggestions from code review
Co-authored-by: regisss <15324346+regisss@users.noreply.github.com>
Co-authored-by: Ella Charlaix <80481427+echarlaix@users.noreply.github.com>
* redirect to correct doc
* _redirects.yml
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Co-authored-by: regisss <15324346+regisss@users.noreply.github.com>
Co-authored-by: Ella Charlaix <80481427+echarlaix@users.noreply.github.com>