Update deploy keys pages

...ascripts/projects/settings/components/access_dropdown.vue

app/views/admin/deploy_keys/edit.html.haml

app/views/admin/deploy_keys/index.html.haml

app/views/admin/deploy_keys/new.html.haml

app/views/projects/deploy_keys/edit.html.haml

doc/security/hardening_application_recommendations.md

doc/user/project/deploy_keys/index.md

ee/lib/ee/gitlab/git_access_project.rb

ee/spec/features/protected_branches_spec.rb

ee/spec/features/protected_tags_spec.rb

lib/sidebars/admin/menus/deploy_keys_menu.rb

locale/gitlab.pot

spec/features/admin/admin_deploy_keys_spec.rb

spec/features/projects/settings/repository_settings_spec.rb

spec/features/protected_branches_spec.rb

spec/features/protected_tags_spec.rb

spec/lib/sidebars/admin/menus/deploy_keys_menu_spec.rb

.../features/protected_branches_with_deploy_keys_examples.rb

...ples/features/protected_tags_with_deploy_keys_examples.rb