Add checks for duplicate data to switch-configuration data files

[kylerisse]

Description

Had concerns that the current pytest based data validation only addressed individual fields and didn't have any insight into duplicate data throughout an entire file. This was addressed in this PR. This PR only addressed the files in /facts but not yet for switch-configuration/config. That needs to be added.

Acceptance Criteria

• duplication checks for columns that should be unique added to CI

[owendelong]

There are a lot of places where data appears to be duplicate in that area but actually needs to be duplicate.

For example, the VLAN list on many trunks will be identical.

There are others. Let's discuss this in more detail before too much implementation gets out of hand. ;-)