Migrate Python SDK to azure-ai-documentintelligence from azure-ai-formrecognizer

[chohlasa]

Noting that the Form Recognizer Python SDK seems like it's being deprecated in favor of an updated Document Intelligence Python SDK.

Migration guide:
https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/documentintelligence/azure-ai-documentintelligence/MIGRATION_GUIDE.md

We may consider bundling this change with adding an api_version attribute to the AzureDIExtractConfig class (this is listed as a to-do in azuredi.py.

[chohlasa]

Hmm, just noticed this setting on our Karpel instance, perhaps this will need to be updated as well:

[jnu]

fixed in #111