[llvm] [llvm][CodeGen] Fix the issue caused by live interval checking in window scheduler (PR #123184)

[Hua Tian via llvm-commits]

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@@ -303,6 +303,7 @@ void WindowScheduler::generateTripleMBB() {
       if (Register AntiReg = getAntiRegister(MI))
         DefPairs[MI->getOperand(0).getReg()] = AntiReg;
     auto *NewMI = MF->CloneMachineInstr(MI);
+    Context->LIS->RemoveMachineInstrFromMaps(*NewMI);
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huaatian wrote:

I find that the issue is caused by this line，which not remove the MI's slot index from the Map.  But I am not sure if this should be fixed here, or intercepted later as I did before.
![image](https://github.com/user-attachments/assets/9b446355-502e-461d-b102-70813b1403ec)
![image](https://github.com/user-attachments/assets/194000c9-bf76-41aa-887e-9d6662fc9b94)


https://github.com/llvm/llvm-project/pull/123184