Add data source for `vlan_segment`

[ens-scmeeu]

Is your feature request related to a problem? Please describe.

We need to reference the path attribute on a vlan_segment in a different Terraform repo, but currently there is only a resource for it (no data)

Describe the solution you'd like

We would like to see a data source added for vlan_segment, specifically ensuring to include the path attribute.

Describe alternatives you've considered

Currently we use terraform_remote_state to retrieve the path attribute. It works, but it is a bit kludgy and we would ideally like independence from the state file.

Additional context

No response