[Release-1.28] - [cloud-provider] only pretend that instances from the current "cloud" exist

[brandond]

Backport fix for [cloud-provider] only pretend that instances from the current "cloud" exist

• [cloud-provider] only pretend that instances from the current "cloud" exist #9280

[mdrahman-suse]

Validation on release-1.28 branch with commit feb211d

Followed steps mentioned here: #9280 (comment)

Replication

$ k3s -v
k3s version v1.28.8+k3s1 (653dd61a)
go version go1.21.8

$ kubectl get nodes -o yaml
...
labels:
      beta.kubernetes.io/arch: amd64
      beta.kubernetes.io/instance-type: k3s
      beta.kubernetes.io/os: linux
      kubernetes.io/arch: amd64
      kubernetes.io/hostname: server1
      kubernetes.io/os: linux
      node-role.kubernetes.io/control-plane: "true"
      node-role.kubernetes.io/etcd: "true"
      node-role.kubernetes.io/master: "true"
      node.kubernetes.io/instance-type: k3s
      topology.kubernetes.io/region: us-east-2
      topology.kubernetes.io/zone: us-east-2a
   ...
    providerID: aws://i-testprovider
...

Validation

$ k3s -v
k3s version v1.28.8+k3s-feb211d3 (feb211d3)
go version go1.21.8

$ kubectl get nodes -o yaml
...
labels:
      beta.kubernetes.io/arch: amd64
      beta.kubernetes.io/instance-type: c4.large
      beta.kubernetes.io/os: linux
      failure-domain.beta.kubernetes.io/region: us-east-2
      failure-domain.beta.kubernetes.io/zone: us-east-2a
      kubernetes.io/arch: amd64
      kubernetes.io/hostname: server1
      kubernetes.io/os: linux
      node-role.kubernetes.io/control-plane: "true"
      node-role.kubernetes.io/etcd: "true"
      node-role.kubernetes.io/master: "true"
      node.kubernetes.io/instance-type: c4.large
      topology.kubernetes.io/region: us-east-2
      topology.kubernetes.io/zone: us-east-2a
    ...
    providerID: aws://i-testprovider
...