Automatic merge from submit-queue (batch tested with PRs 48702, 48965, 48740, 48974, 48232)

Rackspace for cloud-controller-manager

This implements the NodeAddressesByProviderID and InstanceTypeByProviderID
methods used by the cloud-controller-manager to the RackSpace provider.
The instance type returned is the flavor name, for consistency
InstanceType has been implemented too returning the same value.

This is part of #47257 cc @wlan0

**Release note**:
```release-note
NONE
```