Bugfix for chat app crashing when using azure service

[stevegbrooks]

Related issue

• Closes [Bug]: chat app crashes when using Azure OpenAI service #257

Description of changes

The skeleton for azure service was not passing the deployment_id, api_version, or endpoint variables through to ellmer.

To fix this, I added these vars (defined by the users environment vars) in the extras param in gptstudio_request_skeleton.azure_openai, and then grab them with skeleton$extras$extras (R is weird sometimes!) in ellmer_chat.gptstudio_request_azure_openai.

For contributors

• I have added the relevant changes to the NEWS.md file
• I have added relevant tests or documentation with my changes

For reviewers

• Changes meet the acceptance criteria of the related issue
• The contribution follows style conventions and code of conduct
• Branch passes automated testing
• I have incremented the package version in the DESCRIPTION file before merging

[JamesHWade]

Thank you for submitting the PR!

It looks like our skeleton test snapshots are now out of date from your improvements. Those need to be updated before merging. I will have time to do that this weekend, but no need to wait on me if you are familiar with the testthat workflow.

[stevegbrooks]

Should be working now - thanks for the reminder to check the tests :)

[JamesHWade]

Nice work! Thanks for the PR.