[Feature]: Rate limit per model per key

[krrishdholakia]

The Feature

Allow admin to set tpm/rpm limits per model per key

Motivation, pitch

hi, i want to be able to distribute one key to each of my customer projects, each key allows them to access to a predefined list of models (associated with the key : this is already possible), but with a different tpm/rpm for each model as i don't want to globally rate limit them accross multiple model, i need a more fine grained rate limit, per key and model.

Twitter / LinkedIn details

cc: @olad32