Add suffixc to all "name"s in add_hydra_models_to_config_store

Problem

At the moment the names are something like "trainer". This is intuitive, but if you want to create a folder in you own project that is called "trainer" which contains multiple trainer configurations, then a yaml file in this folder will start with

defaults:
  - trainer

accelerator: "cpu"
devices: 1

This will lead to a cyclic import, and an error.

Suggested Solve

Change all names in add_hydra_models_to_config_store to have a suffix like "_struct".

example:

config_store.store(name="trainer_struct", node=Trainer, group="trainer")

Then the yaml file would look like this:

defaults:
  - trainer_struct

accelerator: "cpu"
devices: 1

and thus we don't have cyclic imports. It also makes it clear where the "default" comes from.