BBS Migration integration test(s)

[dylan-smith]

We'll want some e2e tests that hit a real BBS environment and invoke the CLI the same way a customer would. Just like the ADO and GH tests, we'll want to have some code that "resets" all the data in the BBS environment to a known state, run the migrations, then check that the final state in github is what we expect.

We should probably do this against at least 3x different BBS environments, one with the latest version, one with the oldest version we support (5.14), and one running on a windows server.

Tasks

• [x] #569
• [ ] #570
• [ ] #571
• [ ] #572
• [ ] #573
• [ ] #574