Selective Hazelcast support

[cdprete]

Hello.

Enhancement
To my understanding of the docs at https://docs.spring-boot-admin.com/3.5.5/docs/server/server#clustering and from trials I did in the past, to have Hazelcast clustering support in an SBA server, both the notification and event maps need to be configured, because otherwise it would crash (e.g.: #4258).
Given the weird behavior in #4599, which is not fixable if not by destroying the environment completely (on rolling updates / zero-downtime deployments, the event cache gets migrated from one old node to new one which is starting automatically), I would like to have the possibility to have only the notifications clustered - in order to avoid duplicates - and not the events as well.
Of course, to make the feature generic enough and profitable also by others, ideally it should be possible to say for each of the caches if they should be created or not.