Missing inference API details

[lcawl]

In #3821 we created specifications for all the service-specific variations of the "create inference endpoint" API. That information was derived from the existing documentation. However, while reviewing the PRs, @l-trotta noticed information that was missing from the docs (and thus from the specs we created).

This issue is intended to track those items and ensure they're ultimately added to the specs:

• Azure OpenAI is missing some service settings, per Add Azure OpenAI inference details #4019 (comment)
• Azure AI Studio is likewise missing some embedding details, per Add Azure AI Studio inference API #4020 (comment)