[llvm] [llvm][AsmPrinter] Add an option to print instruction latencies (PR #113243)

[Jon Roelofs via llvm-commits]

jroelofs wrote:

> The instantiation of the template can be in the right library, no?
> And the functor I was mentioning would be nullptr by default and only implemented in the CodeGen library.

Ok, that works.

https://github.com/llvm/llvm-project/pull/113243