Object store for artifacts

Closes gitlab-ce#29203

See merge request !1762

FE for https://gitlab.com/gitlab-org/gitlab-ce/issues/34102

spacing updates to expander button
sub-title fixes

Rename other URL generators

admin_builds_path -> admin_jobs_path

Fix tests and more renaming

Fix more tests

Also change build_id to job_id in the controller

Rename Build to Job

Replace "Builds" by "Jobs" and fix broken specs

Replace "Builds" by "Jobs"

Fix broken spinach test

Fix broken test

Remove `˙` at the beginning of the file

Fix broken spinach test

Fix broken tests

Changes after review

Removed unneeded `project_title` code and last reference

Added CHANGELOG entry

Added sidebar
Removed elements not present in design

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

With new navigation design it makes no sense to duplicate title in the
header
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Closes #12491

See #10982.