Display custom hook error messages when automatic merge is enabled

Closes gitlab-ce#29125

See merge request !1670

Services=>Integrations

See merge request !1655

CE upstream

Closes #2175, gitlab-ce#30810, gitlab-ce#27655, and gitlab-ce#30863

See merge request !1664

Highlight Contribution Analytics tab under groups when active, remove sub-nav items

Closes #2204

See merge request !1677

Refactor changing files in web UI

See merge request !1268

Port of 30985-cancel-pipelines to EE

See merge request !1676

Usage ping back back ports

See merge request !1587

Ignore internal users on user counts

Closes #2096

See merge request !1659

Fix searching notes and snippets as an auditor

Closes #2206

See merge request !1674

Move clauses from query to filter stage for elasticsearch notes

Closes #1776

See merge request !1675

Remove records with action=approvals from system_note_metadata

Closes #2192

See merge request !1673

update textarea height and refocus when attaching files

Closes gitlab-ce#30008

See merge request !1669

Remove IIFEs from diff_notes_bundle.js

See merge request !1672

This helps avoid hardcoded limits on number of query clauses

Port of vue-pipelines to EE

See merge request !1666

Refactor group search out of global search

Closes gitlab-ce#30615

See merge request !1649

# Conflicts:
#	app/assets/javascripts/diff_notes/components/resolve_btn.js

Remove useless defaults in link_to_member_avatar.

Closes #2185

See merge request !1661

also fix extra newline when pasting image into textarea

Move link_to_member_avatar_spec to vue_shared.

See merge request !1665

CE upstream - Friday

Closes gitaly#183

See merge request !1651

Improves support for long build traces:

Closes #30696

See merge request !10660