Add DumpDelegate sos command (#20591)

Add DumpDelegate sos command (#20591)

* Add DumpDelegate sos command

Finding out what method a delegate points to today with SOS is tedious.  This PR adds a DumpDelegate command that simplifies it: give it the delegate address, and it outputs a line for each delegate that makes up the input delegate, where each line includes the target object, the method descriptor, and a friendly name.

* Address PR feedback

And fix some warnings that were showing up in CI but not locally.