Multi tenant vespa (#2762)

* add vespa multi tenancy

* k

* formatting

* Billing (#2667)

* k

* data -> control

* nit

* nit: error handling

* auth + app

* nit: color standardization

* nit

* nit: typing

* k

* k

* feat: functional upgrading

* feat: add block for downgrading to seats < active users

* add auth

* remove accomplished todo + prints

* nit

* tiny nit

* nit: centralize security

* add tenant expulsion/gating + invite user -> increment billing seat no.

* add cloud configs

* k

* k

* nit: update

* k

* k

* k

* k

* nit

backend/Dockerfile

@@ -92,6 +92,7 @@ COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 COPY ./danswer /app/danswer
 COPY ./shared_configs /app/shared_configs
 COPY ./alembic /app/alembic
+COPY ./alembic_tenants /app/alembic_tenants
 COPY ./alembic.ini /app/alembic.ini
 COPY supervisord.conf /usr/etc/supervisord.conf