Add key to ChoiceSets to allow user override of choices #189
Description
Is your feature request related to a problem? Please describe.
In certain plugins and certain netbox choicesets themselves, users are able to override the choiceset via the FIELD_CHOICES variable in configuration.py. This is achieved by adding a 'key' attribute under the choiceset itself.
eg (from netbox-inventory):
class AssetStatusChoices(ChoiceSet):
key = 'Asset.status'
meaning its then possible to reference (as per the example above) nb_inventory.Asset.status to override or add to the pre-configured choices.
Describe the solution you'd like
As above a key on BGPSessionStatus to allow configuration.py overrides and additional choices. Note this should only apply where choices are descriptive
Describe alternatives you've considered
n/a
Additional context