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

[Rahul Joshi via llvm-commits]

jurahul wrote:

Yes, I'll make it static when I re-apply the change. While at that, for does `static` works as expected for function templates? If that's the case, then for the code generated by DecoderEmitter, we don't need any namespace as all all the data and functions are marked static.

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