Draft: work on new EventLoop configuration mechanism

The main goal here is to allow running part of the configuration on the worker node. Since this is already a breaking change to some extent I figured I do a bit more of a rework at the same time. However, hopefully in the grand scheme users can still do a very straightforward translation.

For now please only look at FullCPAlgorithmsTest_elconfig.py which has some comments etc. The remaining files are mostly here so that I can test that this at least runs and works.