[JENKINS-70105] Slow down websocket re-connect
[JENKINS-70105] Slow down websocket re-connect

More information in [JENKINS-70105](https://issues.jenkins.io/browse/JENKINS-70105).

This is aligned with the existent inbound tcp agent re-connect logic,
which is waiting for 10 seconds before earch re-try.

jenkinsci/remoting,jenkinsci/remoting