Rolls back the latest possible migration.

Resolve "Snippets uploads fails when background upload is enabled"

Closes #5307

See merge request gitlab-org/gitlab-ee!5049

Refactor object storage for CE

Closes #4952, #4928, #4980, #4915, #4879, #4171, #4163, #3370, #2841, and gitlab-ce#29203

See merge request gitlab-org/gitlab-ee!4736

EE port of prettier-ignore

See merge request gitlab-org/gitlab-ee!5085

[Geo] Add storage version to logs

See merge request gitlab-org/gitlab-ee!5078

Resolve "Add issue weight indicator on the issue cards in the issue board"

Closes #4006

See merge request gitlab-org/gitlab-ee!4960

CE upstream - 2018-03-21 21:28 UTC

Closes gitlab-runner#1621 and gitaly#1092

See merge request gitlab-org/gitlab-ee!5070

`foreign_key_exists?` was changed upstream; this migration doesn't need to
define its own version any more.

Introduce latest security changes to `master` EE

See merge request gitlab-org/gitlab-ee!5062

Remove full_namespace_format_regex because it's not used

See merge request gitlab-org/gitlab-ee!5061

Move email footer info to a single line -- EE merge edition

See merge request gitlab-org/gitlab-ee!5066

Break utils functions for security issues

See merge request gitlab-org/gitlab-ee!5064

Beside that it's using the same instance variable with
`namespace_format_regex` which is going to cause issues.

[ci skip]

[ci skip]

Geo - Avoid rescheduling the same project again in a backfill condition

See merge request gitlab-org/gitlab-ee!5069

# Conflicts:
#	app/assets/javascripts/ide/components/ide_project_tree.vue
#	app/assets/javascripts/ide/components/repo_file.vue
#	app/assets/javascripts/ide/ide_router.js
#	app/assets/javascripts/ide/stores/workers/files_decorator_worker.js
#	app/views/projects/tree/_tree_header.html.haml
#	config/webpack.config.js
#	db/schema.rb

[ci skip]

Add docs on CI caching

Closes #32515, #18945, and gitlab-runner#1621

See merge request gitlab-org/gitlab-ce!12183

Move TimeTrackingCollapsedState vue component

See merge request gitlab-org/gitlab-ce!17399

See https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/17916

From
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5031#note_64372406