Add Focus_weights to cluster network params

[ktehranchi]

Checklist

• [X] I am running on an up-to-date pypsa-usa environment. Update via conda env update -f envs/environment.yaml

Issue exisits on what branch

Master, Develop

The Issue

If the user changes the focus weights, the network will not re-run the cluster network rule.

Steps To Reproduce

No response

Expected Behavior

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Error Message

No response

Anything else?

No response