This matches the optimization pipeline's PassRegistry.def.
I ran into a bug where CONSTRUCTOR wasn't always being used (in
PassBuilder::registerMachineFunctionAnalyses()).
Make DUMMY_* just accept a pass name, there's no point in having proper
constructors if the generated dummy class has a templated constructor
accepting arbitrary arguments.
Remove unused getPassNameFromLegacyName() as it was using this but for
no purpose.
Remove DUMMY_MACHINE_FUNCTION_ANALYSIS, we can just add those as we port
them.
This for some reason exposed missing mock calls in existing unittests.
`CodeGenPassBuilder` is not very tightly coupled to CodeGen, it may need
to reference some method in pass builder in future, so move
`CodeGenPassBuilder.h` to Passes.
