[New Feature] APIM as a multi-tenant GenAI gateway

[sushaanttb]

What?
A new scenario/capability to demonstrate a pattern of using APIM as a multi-tenant GenAI gateway.

Why?
With the rapid advancement in LLMs/GenAI , more & more organizations which operate in a SaaS model are now looking to build a GenAI gateway system with multi-tenancy as a key feature of their system.

For example -

1. Exposing LLM APIs based on different tiers of customers - premium (most premium models), shared, freemium (basic capacity models)
2. Controlling access of LLM APIs, for example giving access to Image APIs only or Chat APIs only, to specific customers.

We recently worked on this scenario for a customer and accordingly identified this pattern which is now being used in Production and also afterwards we received similar requirement from another customer, and they are looking for exact same solution.

We already have written a blog post around it -
https://devblogs.microsoft.com/ise/multitenant-genai-gateway-using-apim/

Having this scenario as part of this accelerator along with the respective code samples, would be a great reference/starting point for consumers having similar requirement, saving their time and effort and also resulting in a more effective adoption of APIM as well.