VMware Engine ve2-standard-128 node type is generally available in us-east4 region

## Announcement VMware Engine `ve2-standard-128` node type is generally available in `us-east4` region. For more information on the node type, see [Node types](https://cloud.google.com//vmware-engine/docs/concepts-private-cloud#node-types). To use the node type in `us-east4` region, contact your Google account team.