[llvm] [lit] Use dbg instead of note for tool detection (PR #193662)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 commented:

I agree this information probably isn't helpful on a development machine, but I feel like it can be useful in some circumstances in CI setups when things go wrong.

It's not very much log output.

https://github.com/llvm/llvm-project/pull/193662