Refactor all specs to use `:integration` factory, allowing us to remove the `:service` alias
For #201848 (closed) the implementation !61210 (merged) renamed the old :service
factory to :integration
, but aliased it as :service
to allow old specs to continue to run unchanged.
This issue is to refactor all specs to use :integration
rather than :service
so we can remove the alias.
Edited by Luke Duncalfe