[v2.2] Inconsistent required fields for Contact & Team for UI vs API

[joewesch]

Environment

• Nautobot version (Docker tag too if applicable): 2.2.0b1
• Python version: 3.11.8
• Database platform, version:
• Middleware(s):

Steps to Reproduce

1. Try and create a Contact or Team via both UI and API

Expected Behavior

Either Phone and Email are required or not required for both methods

Observed Behavior

Phone and Email are not required for UI:

Phone and Email are required for API:

[glennmatthews]

Looks like the recurrent DRF issue where any field included in a unique_together gets incorrectly auto-marked as required in the API. Solution is to override the automatically generated validators on the serializer and do the validation manually instead. (Example: https://github.com/nautobot/nautobot/blob/develop/nautobot/dcim/api/serializers.py#L208-L209 and https://github.com/nautobot/nautobot/blob/develop/nautobot/dcim/api/serializers.py#L239-L247)

[joewesch]

FYI, it looks like Teams are also affected.