[clang] [llvm] [transforms] Inline simple variadic functions (PR #81058)

[Jon Chesterfield via cfe-commits]

JonChesterfield wrote:

Ah OK, so split every variadic definition and let the inliner sort it out afterwards. Yes, I'm good with that. Tests either get messier or add a call to the inliner. Will update the PR correspondingly, solid simplification, thanks!

Discard the combinatorial testing comment - I misunderstood the structure you had in mind.

https://github.com/llvm/llvm-project/pull/81058