add node shutdown taint

shutdowned -> stopped

use shutdown everywhere

use patch in taints api call

use notimplemented in clouds use AddOrUpdateTaintOnNode

correct log text

add fake cloud

try to fix bazel

add shutdown tests

add context

pkg/cloudprovider/providers/cloudstack/cloudstack_instances.go

@@ -158,3 +158,8 @@ func (cs *CSCloud) InstanceExistsByProviderID(ctx context.Context, providerID st
 
 	return true, nil
 }
+
+// InstanceShutdownByProviderID returns true if the instance is in safe state to detach volumes
+func (cs *CSCloud) InstanceShutdownByProviderID(ctx context.Context, providerID string) (bool, error) {
+	return false, cloudprovider.NotImplemented
+}