RDS: Remove the link-local restriction as a stop gap measure

RDS: Remove the link-local restriction as a stop gap measure

Fresh CRS install seems to have a dependency with RDS IB link-local
connection going through. Setting the cluster_interconnect
parameter to non-link local address isn't covering the fresh
install usecases.

So as a stop gap measure, we just warn the user but let the connection
through till we come up with a solution to re-introduce the change.

Orabug: 2360905

Tested-by: Maria Yip <maria.yip@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>