Continues the iteration on the project overview UI:

- moved star, fork and new clone button
(copy SSH/HTTPS URLs) to top right,
  made them smaller
- avatar is now larger (64px)
- 'Request access' is now a link instead
  of a button
- overview comes before the description +
  changed styling and added icons
- description font-size is now 16px (large-paragraph)
- quick links to files are moved downwards
  below the commit/pipeline info
- margins changed to group content into
  4 groups to clean up the interface
- visibility info reduced to icon-only and
  moved to the right of the title

This integration no longer works and does not appear to be supported.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/39697

Hide the push to master instructions for users that are not allowed to
do that.

Also hide buttons that would direct them to commit directly in master

- Change find_cluster_platform_kubernetes to ignore environment argument
- Fix broken specs

CE Port of: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5047/

See
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16900#note_60175507