Allow no REACT_APP_AUTHENTICATION_METHOD

[hawkeye-7]

Is your feature request related to a problem? Please describe

We do not need to plug into a security application at the metagrid level

Describe the solution you'd like

Instead of
REACT_APP_AUTHENTICATION_METHOD=globus
or
REACT_APP_AUTHENTICATION_METHOD=keycloak

Allow
REACT_APP_AUTHENTICATION_METHOD=none

Describe alternatives you've considered

Additional context