MCCS-976 Create and test chart with AAVS multiplicity

A new chart was created (charts/ska-low-mccs-aavs) which uses the same format as the existing ska-low-mccs chart but has been expanded to include: 256 antennas, 16 tiles, 4 apius, and 2 subracks. The device yaml files in the charts/ska-low-mccs-aavs/data directory had to be expanded and the charts/ska-low-mccs-aavs/values.yaml file was also edited to include multiple instances of these devices.

To deploy the new chart run the make k8s-install-chart command with these arguments: K8S_CHART=ska-low-mccs-aavs KUBE_NAMESPACE=ska-low-mccs

The values.yaml file can be edited to specify which device instances to deploy.