Wire up image building UI to binderhub service in imagebuilding-demo

[yuvipanda]

• Sets up binderhub as a service in imagebuilding-demo
• Brings in Use URLSearchParams() to construct query strings jupyterhub/binderhub#1741 and Allow passing buildOnly param to the server from the js client jupyterhub/binderhub#1742
  to the client, as part of yuvipanda/jupyterhub-fancy-profiles@2f9b899

Screen.Recording.2023-09-14.at.11.01.55.PM.mov

[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
kubeconfig	utoronto	No		Yes	Following helm chart values files were modified: r-staging.values.yaml, common.values.yaml
gcp	2i2c	No		Yes	Following prod hubs require redeploy: imagebuilding-demo

Production deployments

Cloud Provider	Cluster Name	Hub Name	Reason for Redeploy
gcp	2i2c	imagebuilding-demo	Following helm chart values files were modified: imagebuilding-demo.values.yaml
kubeconfig	utoronto	prod	Following helm chart values files were modified: common.values.yaml
kubeconfig	utoronto	r-prod	Following helm chart values files were modified: common.values.yaml

[github-actions]

🎉🎉🎉🎉

Monitor the deployment of the hubs here 👉 https://github.com/2i2c-org/infrastructure/actions/runs/6200890475