Enable the prototype UI for the imagebuilding-demo hub

[GeorgianaElena]

Closes #2884

The prototype UI shows, although it takes a bit of time to load:

Important Note

There is one caveat:
I built the static assets with webpack locally then pushed them to GitHub so I can have them available. I didn't manage to do this very easily on the hub. It's at https://github.com/yuvipanda/prototype-kubespawner-dynamic-building-ui/compare/main...GeorgianaElena:prototype-kubespawner-dynamic-building-ui:add-static-assets?expand=1.

@yuvipanda, what do you think? What would be the correct way to do this?

[github-actions]

Merging this PR will trigger the following deployment actions.

Support and Staging deployments

Cloud Provider	Cluster Name	Upgrade Support?	Reason for Support Redeploy	Upgrade Staging?	Reason for Staging Redeploy
aws	openscapes	No		Yes	Following helm chart values files were modified: staging.values.yaml, common.values.yaml
aws	nasa-ghg	No		Yes	Following helm chart values files were modified: staging.values.yaml, common.values.yaml
aws	nasa-veda	No		Yes	Following helm chart values files were modified: staging.values.yaml
gcp	2i2c	No		Yes	Following prod hubs require redeploy: imagebuilding-demo

Production deployments

Cloud Provider	Cluster Name	Hub Name	Reason for Redeploy
aws	openscapes	prod	Following helm chart values files were modified: common.values.yaml
aws	nasa-ghg	prod	Following helm chart values files were modified: common.values.yaml
gcp	2i2c	imagebuilding-demo	Following helm chart values files were modified: imagebuilding-demo.values.yaml

[yuvipanda]

@GeorgianaElena I think building them locally right now is ok. If you make a PR with locally built js am happy to merge that.

[GeorgianaElena]

@yuvipanda, done in 2i2c-org/jupyterhub-fancy-profiles#2

[github-actions]

🎉🎉🎉🎉

Monitor the deployment of the hubs here 👉 https://github.com/2i2c-org/infrastructure/actions/runs/5998204250