harmonize output of solving rules

[FabianHofmann]

only copy active configuration to results folder
use copy config for all solve rules
remove copying of environment

Changes proposed in this Pull Request

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in all of config.default.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv.
• A release note doc/release_notes.rst is added.

[fneum]

LGTM. We could think of adding a commit-hash to n.meta, like abcd1234-dirty to follow version of preparation and solving scripts.

[FabianHofmann]

LGTM. We could think of adding a commit-hash to n.meta, like abcd1234-dirty to follow version of preparation and solving scripts.

Indeed, and since we are storing the config in the network meta anyway, should we just get rid of the copy config for good?

[fneum]

Hmm, you're right that there's some duplication but maybe a YAML is easier to inspect ad-hoc.

[lisazeyen]

I would favor keeping the .yaml file. It is also useful if you want to use it for a summary script of all scenarios since you do not have to read in a pypsa network to check the n.meta