[llvm] [MachinePipeliner] Fix store-store dependences (#72508) (PR #72575)

[Yuta Mukai via llvm-commits]

ytmukai wrote:

Hi @bcahoon, my colleague @kasuga-fj has posted a proposal about this issue below. Could you please give us your opinion? 
https://discourse.llvm.org/t/machinepipeliner-replace-swingschedulerdag-with-directed-graph-that-allows-cycles/76465

https://github.com/llvm/llvm-project/pull/72575