Need better error message when user has old unsupported version of openai already installed

[jamie256]

If you have older versions of openai package installed that are unsupported, and if you don't follow the openai example install command with the openai extra:
https://github.com/whylabs/openllmtelemetry/blob/mainline/notebooks/Instrumenting_OpenAI.ipynb

then the instrument call fails in a confusing way because the unsupported openai package version will not have raised the usual warning from pip, and you get:

TypeError: _with_tracer() missing 1 required positional argument: 'guard'

when calling openllmtelemetry.instrument()

We should check for these older versions and emit a friendly warning urging the user to upgrade openai to a supported version.