Form conversion: Compute/Cloud/Key Pair Add

[himdel]

Convert form to use DDF/React and API - parent issue #6825

Location: Compute/Cloud/Key Pair
Form: Add

current type: Angular
API state:
Need info

PM Input: 1 - Low

imported status: NOT ASSIGNED

[skateman]

I don't see an edit feature for this form, only an add, even though there's an API endpoint for both. Anyway, this should be fairly easy, the request should be sent using API.post('/api/auth_key_pairs', {...data}) when creating a new item.