enable Rivet4 support
Description
Add support for Rivet4 in the 2.2.x series.
Note that Rivet4 (and YODA2) require C++17 where the auto_ptr
is removed (it's had been deprecated in C++14 already).
Test Plan
It compiles ...
Example Result
Additional Checklist Items
-
I have updated documentation as needed -
I considered if this should be cherry-picked/ported somewhere else (rel-2-x or master), and if yes, opened a corresponding issue or MR
Edited by Enrico Bothmann