ci: replace .common template with default key
ci: replace .common template with default key

Useful note, default inheritence can be disabled if needed
with `inherit: default:` or straight overwritten.

https://docs.gitlab.com/ce/ci/yaml/README.html#global-defaults

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg