Move zed cam launch file, and docker-compose file, to their own repos

[mdepp]

In brief, the idea is we'll use ros noetic on the rover for everything but zed-ros-wrapper, and run everything in docker. Because the software repo expects to have only one docker image, the zed cam stuff should be split into its own repo.

Full plan is here: https://docs.google.com/document/d/1vwGU50ECUAwoaORz-af81Fu6uG65rm8wQEljyBXbkI4/edit