Add Application Setting to configure Container Registry token expire delay (default 5min)

CHANGELOG

app/controllers/admin/application_settings_controller.rb

app/models/application_setting.rb

...ervices/auth/container_registry_authentication_service.rb

app/views/admin/application_settings/_form.html.haml

...er_registry_token_expire_delay_to_application_settings.rb

doc/api/settings.md

lib/api/entities.rb

lib/gitlab/current_settings.rb