This epic is to update the Mistral models supported for Self-Hosted. It includes adding support for Mistral Small (Apache 2.0 license) and deprecating Mistral 7B-it ### Definition of Done * Mistral Small has been added as supported for Self-Hosted across all GA and beta use cases * Devstral Small has been added as supported for Self-Hosted across all GA and beta use cases * Mistral 7B-it has been deprecated