Generate an "analyzing visitor"

[ghost]

In the SARIF SDK, the SARIF validation utility (Sarif.Multitool -validate) visits each node in the SARIF object model, running each validation rule over each node. At the moment, the visiting code is hand-written (see SarifValidationSkimmerBase.cs). The code generator should generate the analyzing visitor.

It might turn out that the RewritingVisitor that the code generator already generates can do the job, but I think I already looked at this question once and decided that it couldn't.