[CIR] Inheriting Constructor/inheriting ctor inlining lowering (#191467) In cases with inheritance/vertual tables/etc, we need to generate a series of constructors to delegate to. There are a handful slightly different cases where we need to generate these/generate calls to these, so this patch does that lowering. The test check-lines are a bit confusing thanks to the ordering differences between declarations. However the LLVM/OGCG lines are copy pasted (plus minor attribute differences), with the exception of the call to a delegated constructor. One thing of note here: There is a difference in behavior with the delegated constructor, which is called out in the test in a comment. Classic codegen has a bug where it correctly creates the declaration without arguments (since this constructor is only for initializing the vtable pointers, arguments aren't necessary). However, when classic-codegen creates the call, it doesn't omit them. This isn't a problem there, however in CIR, this causes us to fail the verifier, so this fixes that in CIR, but leaves it alone in OGCG.
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