We could speed it up and test more keys later

we're not really supporting them out of the box. See:
https://gitlab.com/gitlab-org/gitlab-ce/issues/44363

jessie doesn't support `ssh-keygen -l -E` but stretch does:
https://manpages.debian.org/jessie/openssh-client/ssh-keygen.1.en.html

Fix background pipeline stages migration

Closes #44135

See merge request gitlab-org/gitlab-ce!18076

Add per runner job timeout

Closes #43426

See merge request gitlab-org/gitlab-ce!17221

ObjectStorage#use_file should respect exclusive lease

Closes gitlab-com/infrastructure#3874

See merge request gitlab-org/gitlab-ce!18052

Fix promoting labels and milestones copy text

Closes #44208

See merge request gitlab-org/gitlab-ce!17726

Ensure hooks run when a deploy key without a user pushes

Closes #44317

See merge request gitlab-org/gitlab-ce!18057

Add canary favicon

See merge request gitlab-org/gitlab-ce!12477

Fix unapproved unassigned merge request e-mails failing -- CE backport

Closes gitlab-ee#3092

See merge request gitlab-org/gitlab-ce!18007

Gitlab-workhorse still needs RepoPath on Git HTTP

See merge request gitlab-org/gitlab-ce!18050

Replace group spinach tests with RSpec analog

See merge request gitlab-org/gitlab-ce!17818

Bump Rugged to 0.27.0

See merge request gitlab-org/gitlab-ce!18069

Promote Timecop gem into joint test/development Bundler group

Closes #44751 et gitlab-ee#5359

See merge request gitlab-org/gitlab-ce!18066

https://gitlab.com/gitlab-org/gitlab-ce/issues/23036

Resolve "There should not be a jump discussion button on issues"

Closes #44717

See merge request gitlab-org/gitlab-ce!18034

Docs: replaces "Libre" => "Core"

See merge request gitlab-org/gitlab-ce!18060

Release notes: https://github.com/libgit2/libgit2/releases/tag/v0.27.0

This version solves a significant performance issue with generating
large diffs: https://github.com/libgit2/libgit2/issues/4460

Timecop was being used in the cycle analytics and burndown seed_fu tasks.
While it seems a little sketchy to use Timecop in this way, this seems like
an exception can be made for test fixtures.

Closes #44751, gitlab-org/gitlab-ee#5359

Use katex min css

See merge request gitlab-org/gitlab-ce!18061

QA: allow rspec files/options to be handled more consistently

See merge request gitlab-org/gitlab-ce!17990

Remove EE-specific comment markers from CE

Closes #44752

See merge request gitlab-org/gitlab-ce!18054

Move 'Registry' after 'CI/CD' navigation item

See merge request gitlab-org/gitlab-ce!18018

Added row hover styles to IDE file list

Closes #44293

See merge request gitlab-org/gitlab-ce!17906