[llvm] [OptBisect] Add support for selecting ranges of passes and refactor DebugCounter to use a shared Range API. (PR #152393)

[Yonah Goldberg via llvm-commits]

YonahGoldberg wrote:

Hey @nikic I think I addressed all your comments, thanks for the feedback :)

The most major change is I decided to make Range into a class to preserve the Begin <= End invariant.

https://github.com/llvm/llvm-project/pull/152393