Test all authenticators for authenticator status endpoint

[telday]

Is your feature request related to a problem? Please describe.

Currently the authenticator status endpoint is only tested using the azure and oidc authenticators. We should test against all authenticators which work with this endpoint.

[telday]

@izgeri The three authenticators which support this endpoint are OIDC, GCP, and Azure. We already test with OIDC, however in order to use GCP and Azure we would need some external setup. Do we actually want to get these two authenticators setup so we can test 200 responses or should we just run the failing tests on all possible authenticators?

[izgeri]

There are e2e tests running in cyberark/conjur - do those tests cover the 200 responses sufficiently?

Also, is it possible to achieve this with a mock server, sort of like @doodlesbykumbi has done with AWS here: cyberark/secretless-broker#1379

[telday]

It looks like the Conjur tests have pretty good coverage of both authenticators. I don't think we can directly setup a mock server like in that example, however we can achieve the same functionality with unittest "mock"ing