Use clients error type when figuring out the errors.

Problem/Motivation

Currently we are looking at the error message we get back from the LLM and try to map that to our exceptions, however the client has a better method for it here: https://github.com/openai-php/client/blob/main/src/Exceptions/ErrorExcep...

We should map to this instead.

Proposed resolution

• Map to the different Exceptions to different error types "insufficient_quota" etc. in OpenAI's responses.
• Do it in one method that can be overriden.