[llvm] [AMDGPU] NFC: Provide RPTracker interface for external iterators (PR #93088)

[Valery Pykhtin via llvm-commits]

vpykhtin wrote:

I haven't found cases where _advance_ or _recede_ arecalled with ShouldTrackIt = false, and the semantics of the flag looks vague, can we avoid the flag?

https://github.com/llvm/llvm-project/pull/93088