Add OpenAI sync embedding instrumentation

[umaannamalai]

This PR adds instrumentation for OpenAI sync embeddings.

[github-actions]

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[hmstepanek]

There's some default settings that I've kinda cleaned up in my PR but we can just take care of it in that one. This looks good as is IMO.

[hmstepanek]

I fixed this in the async PR but this should be:

Suggested change

	return
	return wrapped(*args, **kwargs)

[hmstepanek]

Again, fixed this in the async PR but...it's possible (though unlikely) that response isn't just None but {} or something else that is Falsey and not None. Just to be safe I'd suggest doing the following instead of an empty return:

Suggested change

	return
	return response