Fix Azure Search authentication key and upgrade utc API

[mrochon]

Motivation and Context

Description

Changed "api_key": AZURE_SEARCH_KEY to "key": AZURE_SEARCH_KEY

Contribution Checklist

• I have built and tested the code locally and in a deployed app
• For frontend changes, I have pulled the latest code from main, built the frontend, and committed all static files.
• This is a change for all users of this app. No code or asset is specific to my use case or my organization.
• I didn't break any existing functionality 😄