Need arm64 capc templates

Currently, there are no prebuilt images for the arm64

http://packages.shapeblue.com/cluster-api-provider-cloudstack/images/

Since CloudStack added support for arm64 hypervisor , we need a prebuilt images for the arm64 

https://docs.cloudstack.apache.org/en/4.21.0.0/installguide/configuration.html#adding-a-cluster