Add module netbox_contact_assignment

[dchiquito]

Related Issue

Fixes #1128

New Behavior

Add the netbox_contact_assignment module

Contrast to Current Behavior

Add the netbox_contact_assignment module

Discussion: Benefits and Drawbacks

Contact assignments bind a contact and role to one of 14 objects in Netbox that allow contact assignments.
I opted to identify contact, role, and object by name for consistency with the rest of modules, even though name isn't strictly speaking a unique identifier. This required a bit of massaging the data to look up the correct IDs to send to the API.

Changes to the Documentation

Automatically generated docs should be fine.

Proposed Release Note Entry

Add module netbox_contact_assignment

Double Check

• I have read the comments and followed the CONTRIBUTING.md.
• I have explained my PR according to the information in the comments or in a linked issue.
• My PR targets the devel branch.

[dchiquito]

This is a new module so no changelog fragment required