[llvm] [LLVM] Add color to SDNode ID's when dumping (PR #141295)

[Jon Roelofs via llvm-commits]

jroelofs wrote:

> 1. The dump uses the same colors for t1 and t8, and t10 and t3.

I think this is unavoidable. These dumps often have way more nodes in them than we have terminal colors available. An astute reader should quickly see that nodes with different colors have different IDs, but that nodes with the same color still need a little more careful of a look.

https://github.com/llvm/llvm-project/pull/141295