Allow superuser to add/edit user keys for others

[abhi1693]

Plugin version

v1.0.16

netbox-plugin-extensions version

None

NetBox version

v3.2.1

Feature type

Change to existing functionality

Proposed functionality

1. As a superuser, I should have access to add or edit an existing public key for other users along with mine.
2. Add an API endpoint to add/edit user keys

Use case

I have several bot accounts that do not have usable passwords due to which I cannot log in as them. They need to be able to fetch the plaintext data for the secrets to perform configuration updates to the devices.

Database changes

None

External dependencies

None