TASK: E2E Testing cleanup

[mhsdesign]

Issues i found:

The homepage node is not clean but has already one node due to the import:

This is a problem as any test running on the homepage has to deal with another content element already being there. Currently it works through mere luck.

Instead we should put this to be deleted node on another subpage like "Node to delete", wait we exactly have it like this but dont utilize it?

Additionally the more tests should run on their own site to avoid any collision. Like the createNewNodes tests should run on their respective site, which is already there but unused?