[JENKINS-57223] - Java11 ClassNotFoundExceptions Telemetry (#4003)

* Proof of concept catching exceptions for java 11 removed classes

* Add ClassLoader to a lot of places. Backup

* Commenting out wip stuff, change packages, count hits findClass

* Improvements, sending and tests

* Removing the catcher from chain to make funcional tests work

* Removing ignored places and a bit of cleaning

* Cleaning unused code after removing the catcher from the chain

* Remove imports cleaning to avoid extra changes

* Cleaning and explaining comments

* Explaining comments

* fix javadoc

* [JENKINS-57223] Address feedback from Matt Sicker. Improve in concurrency

* [JENKINS-57223] Search on cause and suppressed exceptions and fix on name reported

* [JENKINS-57223] Add cycles control on exceptions and refactor reporting method

* [JENKINS-57223] Add trim to class name comparison

* [JENKINS-57223] Address Oleg's feedback and some improvements

* Avoid sending CNFE when ignored later in code
* Disable when running on Java 8 and a test
* Avoid sending empty events

* [JENKINS-57223] Polish assertion after printing all missing classes in logs

* [JENKINS-57223] Avoid extra if and add curly braces

* [JENKINS-57223] Better comment about time window check