[PY] feat: deploy echo bot to azure

[blackchoey]

Linked issues

closes: #1254

Details

1. Add configuration to allow users deploy the sample to Azure
2. Use Flask instead of FastAPI, which is easier to be hosted using Azure App Service
3. Adjust Teams Toolkit configuration to follow Python extension team's recommended experience
4. Remove unused Attach to Local Service config in launch.json

Note: remote deploy requires Teams-AI being published to PYPI. I have manually tested the deploy configuration with a private Teams-AI package locally.

Attestation Checklist

• My code follows the style guidelines of this project

• I have checked for/fixed spelling, linting, and other errors

• I have commented my code for clarity

• I have made corresponding changes to the documentation (updating the doc strings in the code is sufficient)

• My changes generate no new warnings

• I have added tests that validates my changes, and provides sufficient test coverage. I have tested with:

  • Local testing
  • E2E testing in Teams

• New and existing unit tests pass locally with my changes

TODO item:

Update pyproject.toml when we publish the Python package to PYPI

[aacebo]

I think its best to keep using poetry for all the benefits it gives us as well as consistency, poetry even has a command for generating requirements.txt for situations like this, it is

poetry export --without-hashes --format=requirements.txt > requirements.txt