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

See https://gitlab.com/gitlab-org/gitlab-ee/issues/3839

Conflicts:
	app/assets/javascripts/projects/project_new.js
	app/views/shared/_import_form.html.haml
	ee/app/controllers/ee/projects_controller.rb
	ee/spec/features/projects/new_project_spec.rb
	locale/gitlab.pot

Implements the client side for gitlab-org/gitaly#819. Which is a server
info command. This checks the server version and git binairy version on
the server.

A small UI was added for administrators, so they can check the status of
the Gitaly server. This is done for each storage the monolith knows.

Because of this commit, gitlab-org/gitlab-ce!15580 is now closed. That
MR removed the Git version too, but didn't replace it with anything.

Removes the text `Handle with care` as it sounds condescending.

gitlab-ce#37513

This got changed for i18n in !12480, however, I forgot to understand
that the meaning of the graphs changed in !12378. This corrects the
behaviour.