Login route does not use auth provider route if social core SAML is used

[lampwins]

Environment

• Python version: 3.8
• Nautobot version: 1.2.7

Steps to Reproduce

1. Configure social core to use an organizational internal SAML provider
2. As an unauthenticated user, try to directly access a page that requires authentication (other than the home page)

Expected Behavior

I expect to be automatically redirected to the remote auth page via /login/saml/

Observed Behavior

I am directed to /login/ which is the local auth endpoint, so the user is prompted for username and password, but these are local credentials and thus do not work.