Superset deployment (#3715)

* Mostly working auth0 setup

* Play with combining permissions

* Enable working auth0 set up

* Add import GammaSQLLab role

* Functioning superset with auth0 registration and postgres backend. No database connection yet

* Create GCS bucket for superset resources

These changes have not been applied! I couldn't
figure out how mount the bucket as a volume in cloud run
using tf so I used the GUI. Now, when I run terraform plan
tf wants to change a bunch of attributes for the cloud run
instance.

This commit also changes the default superset registration user

* Add superset cloud run gcs mount to terraform

* Use pg8000 and sqlalchemy URL to connect to cloud sql

* Switch back to using connection string for superset backend

* Add readme, requirements file, cloud run deployment command to cloud build script

* Update superset/README.md

Co-authored-by: Dazhong Xia <[email protected]>

* Update superset/README.md

Co-authored-by: Dazhong Xia <[email protected]>

* Add auth0 instructions to readme, add default values for superset docker compose env vars

* Pin superset base image version

* Update conda lock files

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Co-authored-by: Dazhong Xia <[email protected]>