Basic implementation

This MR starts moving us along the path towards #1 (closed). This simply takes the existing G Suite sync tool, strips out all of the Google related functionality and replaces it with simple generation of the LinkedIn Learning CSV as documented in the admin guide.

It is still an open question as to how we will deal with removing licenses. Even the docs only ever talk about adding them.

Before #1 (closed) can be considered closed we need to wire in some integration with the LinkedIn Learning API such as it is and spin up some sync jobs.

Most of the commits in this MR are uninteresting removal/renaming changes. It is 6f13fd5e which actually implements some LinkedIn Learning-related logic.

Closes #2 (closed)