allow excluding files from shared_resources

[toniseibold]

Changes proposed in this Pull Request

The scenario management has the config[run][shared_resources]. However, it is sometimes helpful to be able to exclude files that are changed for each scenario when setting config[run][shared_resources]=base.
Here the helpers function get_run_path now takes an additional list of files that should be excluded from the filesharing.
exclude accepts a list of strings, the string only needs to match the start of a filename since the function startswith() is used in the helpers function. E.g. "transport_data" would exclude both transport_data.csv and transport_data_{simpl}_{clusters}.csv from filesharing.

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.