- The function is calling python command which can be aliased to different python versions on different systems, the function depends on mock library which comes pre-installed on python v3.7+
- Add a python alias detection command which gets the correct python command which is aliased to python3.7+

Closes #3392 

Closes #3174

This deprecates the (internal) use of package URLs and instead replaces with `datasource`/`lookupName`.

Closes #3005 

Closes #3131, Closes #3136 

Closes #2914