Add debugpy to all flavors which provide python

[tkilias]

Background:

• The standard python debugger pdb doesn't provide remote debugging or attach to process capabilities.
• However, sometimes it is necessary to debug Python UDFs inside the database.
• https://github.com/microsoft/debugpy/ provides a python debugger which can listen on a network port and can be started from within the script. This is perfect for our Python UDFs.

Acceptance Criteria

• Add debugpy as a package to all flavors which provide python
• Add test if the package loads
• If possible, test which checks if the debugger works

Status

• Standard 8
• Standard 7.1
• Standard 7.0
• Python 3.7
• Python 3.8