Reduce DB-load for build-queues by storing last_update in Redis

See merge request !1083

CE upstream

Closes gitlab-ce#26762

See merge request !1075

Reduce DB-load for build-queues by storing last_update in Redis

See merge request !8084

[EE] Use `:empty_project` in Project, User, MergeRequest, and MoveToProjectFinder specs

See merge request !1079

Port of 26138-combine-webhooks-and-services-settings-pages to EE

See merge request !1076

Remove redundant `Repository#fetch_remote_forced!` method

Closes #1537

See merge request !1080

Document GIT_SUBMODULE_STRATEGY

See merge request !8586

Rename duplicate migrations and skip them if table/columns are already present

Closes #26868

See merge request !8644

We already have `#fetch_remote` which accepts a `forced` option and is
used in other sections of the codebase.

Introduce build minutes (again)

Closes #1405

See merge request !1078

The time tracking feature was backported from EE to CE, thus the CE
migrations should be uniquely named and should skip the actual migration
content if the table/columns already exist (that means that the EE
migrations were already performed).
Signed-off-by: Rémy Coutable <remy@rymai.me>

Introduce build minutes

Closes #1405

See merge request !965

New U2F ineligible message

Closes #26066

See merge request !8392

Add an image to the public access documentation and fix wrong profile path

See merge request !8583

Resolve "Error handling in environments list"

Closes #25507

See merge request !8461

Fixes builds dropdown making request when clicked to be closed

Closes #26601

See merge request !8545

Add margin to math blocks

Closes #26472

See merge request !8543

Revert "Merge branch 'introduce-build-minutes' into 'master'"

See merge request !1077

This reverts merge request !965

Replace many :project with :empty_projects in API specs

See merge request !8608

Ensure group acts as a namespace for polymorphic routes

Closes #26810

See merge request !8627

Introduce build minutes

Closes #1405

See merge request !965

Fix todos spec

See merge request !8643