Update to use the new Google Identity Services SDK before March 31, 2023

[ajm-ska]

We use Google authentication in our carta-controller deployment at ASIAA.
I have received an email from Google stating:
[Action Required] Migrate to the new Google Identity Services library as soon as possible

One or more of your web applications uses the legacy Google Sign-In JavaScript library. Please migrate your project(s) to the new Google Identity Services SDK before March 31, 2023.

They provide a link to Instructions on how to do so: https://developers.google.com/identity/gsi/web/guides/migration
It looks like it will be easy to do, only requiring changes to a few lines.

[veggiesaurus]

@daikema is this something that we'll need to do once your OIDC stuff is merged in? Or do we no longer need the google libraries?

[daikema]

I think that once the OIDC stuff is merged in it should no longer to be necessary to have that separate Google auth process working. I tested using Google as IDP during the dev of that OIDC auth configuration to verify that it'd work and also had some students report success using it here as well.

[veggiesaurus]

Ok, then we can close this issue once your PR has been merged and tested with Google login