Take into account all possible states of c.Authenticator.admin_users …

[GeorgianaElena]

…list in a hub config

Fixes #1671 based on @sgibson91 's awesome detective work ✨

With this, we can remove redundant config that specifies "admin_users = []" in the config, but won't do it in this PR yet, because it might cause conflicts for #2277
Will do all necersary simplification of the auth config in that big PR instead.

This came up when playing with CILogon on the staging hubs, when I realized that the 2i2c dask-staging hub had no admin users.

[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
gcp	2i2c-uk	No		Yes	Core infrastructure has been modified
gcp	linked-earth	No		Yes	Core infrastructure has been modified
gcp	pangeo-hubs	No		Yes	Core infrastructure has been modified
aws	nasa-veda	No		Yes	Core infrastructure has been modified
gcp	callysto	No		Yes	Core infrastructure has been modified
aws	victor	No		Yes	Core infrastructure has been modified
gcp	leap	No		Yes	Core infrastructure has been modified
aws	ubc-eoas	No		Yes	Core infrastructure has been modified
gcp	2i2c	No		Yes	Core infrastructure has been modified
gcp	cloudbank	No		Yes	Core infrastructure has been modified
aws	openscapes	No		Yes	Core infrastructure has been modified
aws	gridsst	No		Yes	Core infrastructure has been modified
aws	nasa-cryo	No		Yes	Core infrastructure has been modified
aws	2i2c-aws-us	No		Yes	Core infrastructure has been modified
aws	carbonplan	No		Yes	Core infrastructure has been modified
gcp	m2lines	No		Yes	Core infrastructure has been modified
gcp	awi-ciroh	No		Yes	Core infrastructure has been modified
gcp	meom-ige	No		Yes	Core infrastructure has been modified
kubeconfig	utoronto	No		Yes	Core infrastructure has been modified

Production deployments

Cloud Provider	Cluster Name	Hub Name	Reason for Redeploy
gcp	2i2c-uk	lis	Core infrastructure has been modified
gcp	linked-earth	prod	Core infrastructure has been modified
gcp	pangeo-hubs	prod	Core infrastructure has been modified
aws	nasa-veda	prod	Core infrastructure has been modified
gcp	callysto	prod	Core infrastructure has been modified
aws	victor	prod	Core infrastructure has been modified
gcp	leap	prod	Core infrastructure has been modified
aws	ubc-eoas	prod	Core infrastructure has been modified
gcp	2i2c	demo	Core infrastructure has been modified
gcp	2i2c	ohw	Core infrastructure has been modified
gcp	2i2c	pfw	Core infrastructure has been modified
gcp	2i2c	peddie	Core infrastructure has been modified
gcp	2i2c	catalyst-cooperative	Core infrastructure has been modified
gcp	2i2c	earthlab	Core infrastructure has been modified
gcp	2i2c	paleohack2021	Core infrastructure has been modified
gcp	2i2c	aup	Core infrastructure has been modified
gcp	2i2c	temple	Core infrastructure has been modified
gcp	2i2c	ucmerced	Core infrastructure has been modified
gcp	cloudbank	ccsf	Core infrastructure has been modified
gcp	cloudbank	csm	Core infrastructure has been modified
gcp	cloudbank	elcamino	Core infrastructure has been modified
gcp	cloudbank	glendale	Core infrastructure has been modified
gcp	cloudbank	howard	Core infrastructure has been modified
gcp	cloudbank	miracosta	Core infrastructure has been modified
gcp	cloudbank	skyline	Core infrastructure has been modified
gcp	cloudbank	demo	Core infrastructure has been modified
gcp	cloudbank	fresno	Core infrastructure has been modified
gcp	cloudbank	lassen	Core infrastructure has been modified
gcp	cloudbank	sbcc	Core infrastructure has been modified
gcp	cloudbank	lacc	Core infrastructure has been modified
gcp	cloudbank	mills	Core infrastructure has been modified
gcp	cloudbank	palomar	Core infrastructure has been modified
gcp	cloudbank	pasadena	Core infrastructure has been modified
gcp	cloudbank	sjcc	Core infrastructure has been modified
gcp	cloudbank	tuskegee	Core infrastructure has been modified
gcp	cloudbank	avc	Core infrastructure has been modified
gcp	cloudbank	csu	Core infrastructure has been modified
aws	openscapes	prod	Core infrastructure has been modified
aws	gridsst	prod	Core infrastructure has been modified
aws	nasa-cryo	prod	Core infrastructure has been modified
aws	2i2c-aws-us	researchdelight	Core infrastructure has been modified
aws	carbonplan	prod	Core infrastructure has been modified
gcp	m2lines	prod	Core infrastructure has been modified
gcp	awi-ciroh	prod	Core infrastructure has been modified
gcp	meom-ige	prod	Core infrastructure has been modified
gcp	meom-ige	drakkar-demo	Core infrastructure has been modified
kubeconfig	utoronto	prod	Core infrastructure has been modified
kubeconfig	utoronto	r-prod	Core infrastructure has been modified

[sgibson91]

Awesome! 🚀

[github-actions]

🎉🎉🎉🎉

Monitor the deployment of the hubs here 👉 https://github.com/2i2c-org/infrastructure/actions/runs/4323084475