[llvm] [ValueTracking] Make Depth last default arg (NFC) (PR #142384)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

There are build failures in CI.

I think the original idea was that making Depth required avoids mistakes during recursive calls inside ValueTracking. But I agree that from the perspective of an external user, having to always specify Depth=0 doesn't make a lot of sense.

https://github.com/llvm/llvm-project/pull/142384