🚀 Describe the new functionality needed

Currently, the collection name is set to be the same as the id of a VectorStore, which is generated at creation time: https://github.com/llamastack/llama-stack/blob/main/src/llama_stack/core/routers/vector_io.py#L151
This new functionality would allow the user to send in the collection name as a parameter or extra parameter when creating the feature store through the client (client.vector_stores.create).

💡 Why is this needed? What if we don't build it?

This is needed to allow users to decide good collection names so that they are distinguishable when choosing which one to retrieve from.
If this is not implemented the users would have to add an extra layer to map between the randomized collection name and the useful one, which can become clunky at scale.

Other thoughts

No response