[llvm] [RemoveDIs] Make verify-uselistorder preserve the input debug info format (PR #87789)

[Stephen Tozer via llvm-commits]

SLTozer wrote:

> Does the commit 

Yeah, that's the intention: all I think is required functionally is to iterate over the values used in debug records; the only debug-record content that could influence verify-uselistorder is if they contain constant values that aren't used anywhere else, but that can happen, so the updated version accounts for that.

https://github.com/llvm/llvm-project/pull/87789