Investigate Support for AWS US GovCloud with RKE2 and Calico

[rosskirkpat]

https://aws.amazon.com/compliance/fips/#FIPS_Endpoints_by_Service
https://docs.aws.amazon.com/govcloud-us/latest/UserGuide/using-govcloud-endpoints.html
https://docs.aws.amazon.com/govcloud-us/latest/UserGuide/govcloud-ec2.html

AWS GovCloud has different endpoints than their commercial cloud. FIPS endpoints only work with https and not http, which is what all of Calico and rke2 default to (port 80 for 169.254.169.254)

[rosskirkpat]

https://github.com/projectcalico/calico/blob/master/api/pkg/apis/projectcalico/v3/felixconfig.go#L134-L142

https://github.com/projectcalico/calico/blob/master/api/pkg/apis/projectcalico/v3/felixconfig.go#L42
https://github.com/projectcalico/calico/blob/master/api/pkg/apis/projectcalico/v3/felixconfig.go#L462-L471