homogeneize OS names in pipeline names

Today we have:

some "historic" pipelines using Ubuntu, but that don't refer to "ubuntu" in their names.
some pipelines using Ubuntu and having "ubuntu" in their names
all pipelines using Suse have "suse" in their names (I think)

When we have multiple pipelines which differ only by the OS variant, it would be good to always have the OS name in the pipeline name.