new connection event

[Oleg Ostanin]

Hello igniters! I wonder if we can add a new event for a failed ssl
connection? Considering security hazards it can be quite helpful to get
notifications in case someone unauthorized is trying to connect to the
cluster. I've created a small pull-request to illustrate a possible
solution.
https://github.com/apache/ignite/pull/8139
Please tell me what do you think.