fix(ui): copied edges must have new ids set

[psychedelicious]

Summary

Problems this was causing:

• Deleting an edge was a copy of another edge deletes both edges
• Deleting a node that was a copy-with-edges of another node deletes its edges and it's original edges, leaving what I will call "ghost noodles" behind

Related Issues / Discussions

I think @JPPhoto had reported this recently but I can't find where that was.

QA Instructions

• Load a workflow
• Copy a node that has a few inputs
• Ctrl + Shift + V to paste the node and its edges
• Delete one of the new edges - before this would delete the OG edge too, after it should not
• Delete the copied node - before this would delete the OG input edges & cause ghost noodles, after should not

Merge Plan

n/a

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• Documentation added / updated (if applicable)