Review most important Jenkins plugins and ensure we have built-in capabilities
This is a meta research issue for determining the top Jenkins plugins and ensuring we have a migration path for them. In some cases this will result in improving documentation in https://docs.gitlab.com/ee/ci/jenkins/index.html (i.e., have a "popular plugins and how to achieve the same thing with GitLab", and in other cases will result in new issues being created to provide first-party capabilities we're missing (and also then update migration docs)
Most installed plugins: https://plugins.jenkins.io/ui/search?sort=installed&categories=&labels=&view=Tiles&page=1&query=
Edited by Jason Yavorska