Improve behaviour for read timeouts

[RobertCraigie]

Confirm this is an issue with the Python library and not an underlying OpenAI API

• This is an issue with the Python library

Describe the bug

The fix for #769 involved adding retries for httpx.ReadTimeout exceptions which works but as the default timeout is 10 minutes, this can quickly rack up time spent in API requests.

We should figure out a better solution here.

To Reproduce

N/A

Code snippets

No response

OS

N/A

Python version

N/A

Library version

v1.2.4