Fix bug to run the cluster wildcard min

[virio-andreyana]

Its a minor bugfix so that the cluster wildcard option min can be run on snakemake without error

• In Snakefile, min doesn't require any number, similar to all
• In cluster_network.py, the number of network after determine_network_topology() is always larger than the original n_cluster. A network copy is made to count that, but better suggestion is appreciated.

Checklist

• I consent to the release of this PR's code under the AGPLv3 license and non-code contributions under CC0-1.0 and CC-BY-4.0.
• I tested my contribution locally and it seems to work fine.
• A note for the release notes doc/release_notes.rst is amended in the format of previous release notes, including reference to the requested PR.

[davide-f]

Great @virio-andreyana :D