[llvm] [MachineSink] Clear kill flags of sunk addressing mode registers (PR #75072)

[David Green via llvm-commits]

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@@ -530,6 +525,14 @@ bool MachineSinking::PerformSinkAndFold(MachineInstr &MI,
     } else {
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davemgreen wrote:

I was thinking of this, if we sink op1 pasted the killed a
```
x = op1 a, b
y = op2 killed a
z = copy x
```

https://github.com/llvm/llvm-project/pull/75072