Closes T200
Created from CERN GitLab [EvtGen!7](https://gitlab.cern.ch/evtgen/evtgen/-/merge_requests/7)
* Remove the following models:
* EvtMultibody
* EvtLb2Lll
* EvtVPHOtoV and EvtVPHOtoVISR
* EvtLambdaB2LambdaV
* EvtKstarstargamma
* EvtbsToLLLL and EvtbsToLLLLHyperCP
* EvtVubAC
* EvtPropSLPole
* Drop unused classes from EvtGenBase
* Tidy up test-all triggers in test script