Enable Vector Indexing on CosmosDB emulator

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

I am trying to develop RAG app via Semantic Kernel Cosmos DB No SQL connector.
But I cannot enable Vector indexing feature of Cosmos DB emulator.

### Describe the solution you'd like

Add API for enable vector indexing feature on Cosmos DB emulator.

### Additional context

_No response_