Make zero to jupyterhub configuration overidable

[costrouc]

Description

Related to issue #476. Right now it is not possible to easily customize the zero to jupyterhub helm chart with QHub. It would be nice to expose the helm overrides in the qhub-config.yaml. This issue will follow very similarly to #813.

Steps

• the qhub module exposes jupyterhub-overrides via https://github.com/Quansight/qhub/blob/main/qhub/template/%7B%7B%20cookiecutter.repo_directory%20%7D%7D/infrastructure/modules/kubernetes/services/meta/qhub/variables.tf#L86.
• need to add a {{ jupyterhub.overrides | jsonify }} to https://github.com/Quansight/qhub/blob/main/qhub/template/%7B%7B%20cookiecutter.repo_directory%20%7D%7D/infrastructure/kubernetes.tf#L203.
• add jupyterhub.overrides key to qhub-config.yaml
• must be specificed in schema.py https://github.com/Quansight/qhub/blob/main/qhub/schema.py

[github-actions]

This issue has been automatically marked as stale because there was no recent activity in 60 days. Remove the stale label or add a comment, otherwise, this issue will automatically be closed in 7 days if no further activity occurs.

[github-actions]

This issue was closed because it has been stalled for 7 days with no activity.

[danlester]

@costrouc Would you be happy for me to reinstate this (and implement it)? Or do you know if you ended up implementing any of this?

I would like to provide the option to enable_auth_state and this could be best if just a generic z2jh override.

[danlester]

Closes #929