move all resources that are applied on every node into site_config::default (#3782)

in commit 338833, we established a relationship between all
resources that have a leap_service tag, that are called in site.pp.
But we had some resources as default on every node in site.pp
(apt::update, Package { require => Exec['apt_updated'] },
site_config::slow and stdlib), that were still lacking any
relationship to the leap_service tag.
By moving them into default.pp they automatically are executed
before resources with a leap_service tag.
Merge branch 'feature/3782_Discuss_run_stages_on_deploy' into develop