Add support for Shibboleth-table auth

[ChemiKyle]

The module currently only recognizes table and shib:

send_rx/includes/send_rx_functions.php

Line 715 in a52189c

switch ($auth_meth) {

In REDCap v10.5.1, when using shibboleth_table globally, the reset password link generated no longer works unless the project is set to use table auth (presumably forcing shib-only would also work for that pipeline). The new users do appear in the redcap_user_information table.