This PR adds support to Owner roles.
The owner role has a similar access level as the admin, but it has the power to delete the account.
Besides that, the role has the following constraints:
- The role can only be transferred. So, only a user with the owner role can transfer the owner role to a new user
- It can't be assigned to users being invited
- It can't be assigned to service users
The new functionality allows blocking a user in the Management service.
Blocked users lose access to the Dashboard, aren't able to modify the network map,
and all of their connected devices disconnect and are set to the "login expired" state.
Technically all above was achieved with the updated PUT /api/users endpoint,
that was extended with the is_blocked field.
This feature allows using the custom claim in the JWT token as a user ID.
Refactor claims extractor with options support
Add is_current to the user API response
