[llvm] [llvm-mca][FeatureRequest] Itimeline graph, note source of delay for each instruction (PR #136423)

[Min-Yih Hsu via llvm-commits]

https://github.com/mshockwave commented:

Please refrain from force pushing unless necessary: https://www.llvm.org/docs/GitHub.html#rebasing-pull-requests-and-force-pushes

https://github.com/llvm/llvm-project/pull/136423