[Maps.Routing] Missing model factory methods

[jsquire]

Summary

A new analyzer has been added which detects missing model factory methods. OpenAI is being flagged for:

• RouteDirectionsBatchResult

Scope of work

• Investigate flagged types and ensure the model factory has the needed methods.
• If a type is being inappropriately flagged, add a local suppression in that type.
• Remove the warning suppression for AZC0035 in the project file.

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @dubiety.