Add "has_virtual_device_context" filter to device filters in UI and API

[SaschaSchwarzK]

NetBox version

v3.7.1

Feature type

Change to existing functionality

Proposed functionality

The only way to find devices that have virtual device context is to get all virtual-device-contexts and extract the list of related devices from that. Similar to the has_primary_ip filter.

Use case

Get the list of devices with have or have not a virtual-device-context with a simple boolean filter.

Database changes

Not required

External dependencies

None

[jeremystretch]

There's ongoing work under #15237 to identify and test for missing filters. It hasn't yet expanded to checking reverse ForeignKey relationships but should eventually cover this sort of thing.