Support for Stream in HTTP Request node and OpenAI node

[papajbeautiful]

Critical for any modern AI use case. When combined with the duplicate feature request (refer below), this is now the most requested feature by a significant margin.

Stream AI responses on HTTP responses, LLM chains, and AI agents nodes

Hello good afternoon my friend, how are you doing the import? Are you using any automated method, has it been working?

Please prioritise this feature!