* WebAPI: read user
We currently need to fetch the whole list of users to get User's
information.
Adding more fields increases the probabilty of having performance
issues.
This PR adds a new endpoint which returns a single user.
This endpoint returns the information we already return when listing
users but also returns the user's traits
This is a follow up of
https://github.com/gravitational/teleport/pull/14076
The following traits are returned:
- Logins
- DB Users
- DB Names
- Kube Users
- Kube Groups
- Windows Logins
- AWS Role ARNs
* Transferred user endpoints/handlers from e
* Transferred and refactored endpoints/handlers for roles, trusted clusters, and github cn from e
* Export ok() func so e can use
* Silence rbac auth connector access denials on first check failure
* Update e-ref
Jakub Nyckowski