get https://api.linode.com//placement/groups
Returns a paginated list of placement groups you have permission to view.
linode-cli placement groups-list
<https://techdocs.akamai.com/cloud-computing/docs/getting-started-with-the-linode-cli>
placement:read_only
<https://techdocs.akamai.com/linode-api/reference/get-started#oauth>