chore: disable local auth for azure openai

[sinedied]

Purpose

Disable Azure OpenAI local auth to comply with new enforced security policies.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[x] Other... Please describe: infra

[github-actions]

This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed.

[sinedied]

@sinedied is this to pass bicep validator? could you please provide link to docs? thanks!