Arista 7050X3 Family (#1478)

* Regenerate master slug list after successful PR merge

* Arista 7050X3 Family

* Adding missing PSUs

* adding latest pickle file

* Fixing lint fails

* fix known-slugs.pickle

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Co-authored-by: NetBox-Bot <info@netboxlabs.com>
Co-authored-by: Daniel W. Anner <daniel.anner@danstechsupport.com>