AWS cloud provider does not support multiple regions in OpenShift

Issue

• The node hosts on other region with master hosts are failed to join to cluster when OCP install with cloud provider on AWS.
• You can see the following messages from master controllers when you met not adding other region's node hosts.

node_lifecycle_controller.go:712] Deleting node (no longer present in cloud provider): ip-10-0-0-1.ap-northeast-1.compute.internal
controller_utils.go:212] Recording Deleting Node ip-10-0-0-1.ap-northeast-1.compute.internal because it's not present according to cloud provider event message for node ip-10-0-0-1.ap-northeast-1.compute.internal

• The worker/compute nodes can not be added to a OCP cluster which is based on the following topology on AWS.

[master/infra] - Region A
          |
    VPC peering
          |
[worker] - Region B

• The installation is failed with the following messages, and node hosts in other regions list in Could not find csr for nodes:.

    Failure summary:

      1. Hosts:    ip-10-1-1-1.us-east-1.compute.internal
         Play:     Approve any pending CSR requests from inventory nodes
         Task:     Approve node certificates when bootstrapping
         Message:  Could not find csr for nodes: ip-10-0-0-1.ap-northeast-1.compute.internal, ip-10-0-0-2.ap-northeast-1.compute.internal