* provider/scaleway: update api version
* provider/scaleway: expose ipv6 support, rename ip attributes
since it can be both ipv4 and ipv6, choose a more generic name.
* provider/scaleway: allow servers in different SGs
* provider/scaleway: update documentation
* provider/scaleway: Update docs with security group
* provider/scaleway: add testcase for server security groups
* provider/scaleway: make deleting of security rules more resilient
* provider/scaleway: make deletion of security group more resilient
* provider/scaleway: guard against missing server
