[llvm] [SeparateConstOffsetFromGEP] Reorder trivial GEP chains to separate constants (PR #73056)

[Aaron Liu via llvm-commits]

AaronHLiu wrote:

> @AaronHLiu this PR was known to cause that exact LIT failure -- this was why it was reverted upstream -- does your build have the revert?
> 
> The reland should be okay; in you deleted comment there was a CHECK line flagged that existed in that bad version of the LIT test and not the reland version (reland: #81671) .

The build did not contain the new version yet. Will check. Thanks! 

https://github.com/llvm/llvm-project/pull/73056