[RFE] - AWS: Cluster Ingress Operator should use CNAME instead of A Alias record

Issue

• On AWS, the cluster ingress operator creates one A Alias DNS records in Route53 for the "*.apps." wildcard URL.
• The internal DNS system does not synchronize A Alias records into the enterprise DNS server and therefore those URLs are not reachable from the company network.
• When changing the Route53 entry that is created by the cluster ingress operator from A Alias to CNAME, the DNS sync is working and the OpenShift Container Platform 4 cluster is reachable from the company network.
• Unfortunately, when doing this the cluster ingress operator is going into the "Degraded" state because the Route53 record it has created is mismatching with the manually altered Route53 entry.
• This "Degraded" operator state leads to the result that we cannot update clusters because all operators have to be alright for the update to complete.
• There is also a Github issue tracking this: Github
• A suggestion should be to either replace the A Alias record with a CNAME record or at least give the possibility to parameterize the operator so that the user can choose whether A Alias or CNAME is used.