Implement Vector store file batches

[slekkala1]

🚀 Describe the new functionality needed

Need to implement the file batches apis
https://platform.openai.com/docs/api-reference/vector-stores-file-batches

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

This will be useful for RAG apps with many files to be uploaded to vector store.
Use Case: Common Crawl to Vector Stores at https://github.com/raghotham/cc-vec

Other thoughts

No response