Revert "net/rds: Revert "RDS: add reconnect retry scheme for stalled

Revert "net/rds: Revert "RDS: add reconnect retry scheme for stalled
connections""

This commit restores commit 5acb959ad599 ("RDS: add reconnect retry scheme
for stalled connections").  Even though this retry scheme "workaround"
causes a long brownout time in the OVM configuration, it is needed to avoid
RDS loopback connections stalls after switch reboot in the bare-metal
system. As for now, the plan agreed with Exadata is to put back this commit
first and have a similar code path among QU6, QU5 and QU4.

Orabug: 26497333

Signed-off-by: Wei Lin Guay <wei.lin.guay@oracle.com>
Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>