Move EE prepend and include calls to the end of models
What does this MR do?
This moves all instances of
prepend EE::Something and
include EE::Something in models to the last line of the corresponding model.
This pushes EE specific code further down the files, reducing the
likelihood of developers running into merge conflicts.
This only takes care of models, primarily to keep the size of the MRs at a size that can actually be reviewed.
This was done using the following Ruby script: https://gitlab.com/gitlab-org/release/framework/snippets/1773219
This MR depends on the changes introduced in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22987.