get https://api.linode.com//placement/groups/
View a specific placement group by ID.
linode-cli placement group-view 528
<https://techdocs.akamai.com/cloud-computing/docs/getting-started-with-the-linode-cli>
linodes:read_only
<https://techdocs.akamai.com/linode-api/reference/get-started#oauth>