This is most a backport of
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/4987/diffs but includes
other columns that use column_exists? in a way that may cause unnecessary
schema loads.

Include the ee/ directory in backtraces

Closes gitlab-ee#5204

See merge request gitlab-org/gitlab-ce!17664

Move NothingToMerge vue component

See merge request gitlab-org/gitlab-ce!17544

Fix removes source branch text being rendered in merged state

Closes #44163

See merge request gitlab-org/gitlab-ce!17687

Fixed issue notes being duplicated

Closes #44099

See merge request gitlab-org/gitlab-ce!17671

Resolve "Hover style for sidebar dropdowns is wrong"

Closes #42579

See merge request gitlab-org/gitlab-ce!17519

Respect the protocol in `expose_url`

Closes gitlab-ee#5217

See merge request gitlab-org/gitlab-ce!17681

When https is configured in the URL, also use that, and do not set it
to http.

Closes gitlab-org/gitlab-ee#5217

Avoid re-fetching merge-base SHA from Gitaly unnecessarily

See merge request gitlab-org/gitlab-ce!17630

Add partial indexes on todos to handle users with many todos

See merge request gitlab-org/gitlab-ce!17668

Fix code and wiki search results when filename is non-ASCII

See merge request gitlab-org/gitlab-ce!17685

Adds guidelines regarding `:key` keyword

See merge request gitlab-org/gitlab-ce!17400

Updates file extensions on Vue docs

See merge request gitlab-org/gitlab-ce!17684

Use object ID to prevent duplicate keys Vue warning on Issue Boards page during development

Closes #44139

See merge request gitlab-org/gitlab-ce!17682

Resolve "Update zaproxy image in Auto DevOps template"

Closes #44096

See merge request gitlab-org/gitlab-ce!17683

Fix "Remove source branch" button in MR widget during MWPS state

Closes #42814 and #4281

See merge request gitlab-org/gitlab-ce!17192

Require jQuery to be explicitly imported

See merge request gitlab-org/gitlab-ce!17674

Previously, we only handled non-ASCII file contents, but the name itself can be
non-ASCII.

Update wording to specify create/manage project vs group labels in labels dropdown

Closes #43702

See merge request gitlab-org/gitlab-ce!17640

Closes #44096

Removes duplicated & non used code

See merge request gitlab-org/gitlab-ce!17667

added spec for polling

Remove sync script for gitlab-svgs and reference the vendored library directly

See merge request gitlab-org/gitlab-ce!17656