Work with PS to refresh/add to Jenkins migration docs
Problem to solve
We created good starter documentation at https://docs.gitlab.com/ee/ci/jenkins/index.html, but it was written by a PM who has not done Jenkins migrations in the field. We should do a documentation pass with PS (cc @dtacheny) to ensure the latest wisdom and techniques are captured there.
Further details
Proposal
Update docs with current thinking, link to other places in PS documentation with relevant info.
Who can address the issue
Will need support from PS team