Increase socket connect retry timeout for integration test (#30681)

*  Increase persistent connection local socket
   retry timeout to fix intermittent failure in
   network integration test

test/integration/network-integration.cfg

@@ -11,3 +11,4 @@ ssh_args = '-o UserKnownHostsFile=/dev/null'
 [persistent_connection]
 command_timeout = 60
 connect_timeout = 60
+connect_retry_timeout = 60