Add VMs implementation to master (#8078)

cluster-autoscaler/cloudprovider/azure/azure_cache.go

cluster-autoscaler/cloudprovider/azure/azure_cache_test.go

cluster-autoscaler/cloudprovider/azure/azure_client.go

...toscaler/cloudprovider/azure/azure_cloud_provider_test.go

cluster-autoscaler/cloudprovider/azure/azure_config.go

cluster-autoscaler/cloudprovider/azure/azure_instance.go

cluster-autoscaler/cloudprovider/azure/azure_manager.go

cluster-autoscaler/cloudprovider/azure/azure_manager_test.go

...scaler/cloudprovider/azure/azure_mock_agentpool_client.go

cluster-autoscaler/cloudprovider/azure/azure_scale_set.go

...er-autoscaler/cloudprovider/azure/azure_scale_set_test.go

cluster-autoscaler/cloudprovider/azure/azure_template.go

...ter-autoscaler/cloudprovider/azure/azure_template_test.go

cluster-autoscaler/cloudprovider/azure/azure_vms_pool.go

...ter-autoscaler/cloudprovider/azure/azure_vms_pool_test.go

cluster-autoscaler/go.mod

cluster-autoscaler/go.sum