rsconnect-python unit and integration tests

[bcwu]

have unit test coverage for every deploy option

• deploy voila
  • manifest test
  • bundle tests
• deploy html
  • manifest test
  • bundle tests
• deploy api
  • manifest test
  • bundle tests
• deploy bokeh
  • manifest test
  • bundle tests
• deploy dash
  • manifest test
  • bundle tests
• deploy fastapi
  • manifest test
  • bundle tests
• deploy streamlit
  • manifest test
  • bundle tests
• deploy manifest
  • bundle tests
• deploy notebook
  • manifest test
  • bundle tests
• deploy shiny
  • manifest test
  • bundle tests
• deploy quarto
  • manifest test
  • bundle tests