We replace the usage of WikiPage::CreateService with the wiki_page factory in the specs.

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Replaces all the explicit include metadata syntax in the specs (tag:
true) into the implicit one (:tag).
Added a cop to prevent future errors and handle autocorrection.

In GitLab EE, a GitLab instance can be read-only (e.g. when it's a Geo
secondary node). But in GitLab CE it also might be useful to have the
"read-only" idea around. So port it back to GitLab CE.

Also having the principle of read-only in GitLab CE would hopefully
lead to less errors introduced, doing write operations when there
aren't allowed for read-only calls.

Closes gitlab-org/gitlab-ce#37534.

We used to include the first and last name of the user, but !6624 modified
this to include only the username. Let's compromise and add both in the form
of `First Last (username)`.

Closes #38865

Closes #38808

Closes #38817

Signed-off-by: Rémy Coutable <remy@rymai.me>

[ci skip]

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/38389

[ci skip]

Closes #38781

Devise sets `current_user`, but not all controllers authenticate users by
session tokens. Try to use the controller-defined `authenticated_user` if
`current_user` is not available.

Closes gitlab-org/gitlab-ee#3611

When there are no filters, we can get the total todos count from the cached
count on the user object, instead of performing a DB query. This query takes
about 80ms for me on GitLab.com.