GraphQL : Add filter arguments at all levels

[dgarros]

Environment

• Python version: 3.7
• Nautobot version: 1.0.0b2

Proposed Functionality

Add filter arguments at all levels for GraphQL
Currently, it's only possible to define filter arguments at the top level

Examples of currently supported queries

{
  devices(site: "ams") {
	id
        name
        interfaces {
           name
    }
  }
  interfaces(name:"Ethernet1", site:"ams") {
    name
  }
}

Proposed query, currently not supported

{
    devices(site: "ams") {
	id
        name
        interfaces(name:"Ethernet1") { <<<<<
            name
    }
  }
}

Use Case

Have a more powerful query engine that will be able to return only the correct results

Database Changes

No

External Dependencies

No

[jathanism]

Tried as I might to address this in #246, I could not get it working and it appears that it will require the use of Relay nodes or filter connections (or both) to make it work.

It might be possible to get it working by leveraging some of the extra filterset/serializers/models types found in graphene-django-extras but it's going to take some trial and error seeing as the documentation for both projects is sparse at best when it comes to advanced filtering patterns.

[itdependsnetworks]

Adding the terms nested graphql query for better searching in the future.

[glennmatthews]

Implemented in next by #799.