Refactor API configuration for Azure provider

[dibyasom]

There's been a recent change, in the SDK - and the given way of configuring azure hosted openAI embedding failed.

I have made the corrections basis what worked, and verified in pip package. The "config" key is incorrect, and raises fatal exception.

[greysonlalonde]

Hi @dibyasom, thanks for flagging this. This is not expected behavior, it would be best to open an issue to track this

[github-actions[bot]]

This PR is stale because it has been open for 45 days with no activity.