feat: relationship between domain.cpu and requests

[scottd018]

Currently, there are 2 ways to specify CPU when creating a Kubevirt VM instance.

1. In the .spec.domain.[requests, limits].cpu section
2. In the .spec.domain.cpu.[cores, sockets, thread] section

I believe the former applies to the launcher pod and the latter applies to the actual VM, so I believe calculating off of the latter is correct. We need to verify and adjust if needed. Here is the code:

	for vm := 0; vm < len(instances); vm++ {
		// according to kubevirt docs, vcpu is determined by the value of sockets * cores * threads
		// see https://kubevirt.io/user-guide/compute/dedicated_cpu_resources/#requesting-dedicated-cpu-resources
		sockets := int(instances[vm].Spec.Domain.CPU.Sockets)
		if sockets == 0 {
			sockets = 1
		}

		cores := int(instances[vm].Spec.Domain.CPU.Cores)
		if cores == 0 {
			cores = 1
		}

		threads := int(instances[vm].Spec.Domain.CPU.Threads)
		if threads == 0 {
			threads = 1
		}

		sum += sockets * cores * threads
	}

[scottd018]

Here is the file where the code exists > https://github.com/scottd018/rosa-windows-overcommit-webhook/blob/main/resources/virtualmachineinstances.go