[llvm] Reapply "[LLVM][TableGen] Parameterize NumToSkip in DecoderEmitter" (#136017) (PR #136019)

[Rahul Joshi via llvm-commits]

jurahul wrote:

Just for completeness, if I change the namespace in my earlier examples to anonymous, both cases (static inline and just inline) work.

https://github.com/llvm/llvm-project/pull/136019