This removes all usage of soft removals except for the "pending delete"
system implemented for projects. This in turn simplifies all the query
plans of the models that used soft removals. Since we don't really use
soft removals for anything useful there's no point in keeping it around.

This _does_ mean that hard removals of issues (which only admins can do
if I'm not mistaken) can influence the "iid" values, but that code is
broken to begin with. More on this (and how to fix it) can be found in
https://gitlab.com/gitlab-org/gitlab-ce/issues/31114.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/37447

CE upstream - Wednesday

Closes gitaly#873 and gitaly#903

See merge request gitlab-org/gitlab-ee!3994

Resolve "Geo secondary can't query geo node status from primary"

Closes #4518

See merge request gitlab-org/gitlab-ee!3997

added missing content-type header to POST/PUT requests

See merge request gitlab-org/gitlab-ee!4014

EE port of admin-dispatcher

See merge request gitlab-org/gitlab-ee!3970

Validate GitLab QA selectors / EE

See merge request gitlab-org/gitlab-ee!3993

Refactor dashboard activities path (EE Version)

See merge request gitlab-org/gitlab-ee!4002

Refactor dispatcher sessions path (EE Version)

See merge request gitlab-org/gitlab-ee!4003

Refactor dispatcher search path (EE Version)

See merge request gitlab-org/gitlab-ee!4005

(cherry picked from commit 09dad69c)

Patches changes from ce to ee for explore-dispatcher-refactor.

See merge request gitlab-org/gitlab-ee!3977

EE branch for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16300

See merge request gitlab-org/gitlab-ee!3963

Add Geo support for CI job artifacts

Closes #2388

See merge request gitlab-org/gitlab-ee!3935

Fix 500 error when visiting a commit where the blobs do not exist (nil blobs) -- EE merge edition

Closes gitlab-ce#41491

See merge request gitlab-org/gitlab-ee!3987

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/41491

Conflicts:
	app/assets/stylesheets/pages/diff.scss
	app/views/projects/diffs/_stats.html.haml

as opposed to files in an object store.

Removes potential race condition specs from Groups::DestroyService

See merge request gitlab-org/gitlab-ee!3999

(cherry picked from commit 14c4d19c)

# Conflicts:
#   app/assets/javascripts/dispatcher.js

# Conflicts:
#   app/assets/javascripts/dispatcher.js