[llvm] [AArch64] Fix handling of x29/x30/x31 in inline assembly clobbers (PR #167783)

[Lukáš Lalinský via llvm-commits]

lalinsky wrote:

The CI failures are interesting, they are actually testing the incorrect behavior:

```
  tail call void asm sideeffect "nop", "~{x0},~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7},~{x8},~{x9},~{x10},~{x11},~{x12},~{x13},~{x14},~{x15},~{x16},~{x17},~{x18},~{x19},~{x20},~{x21},~{x22},~{x23},~{x24},~{x25},~{x26},~{x27},~{x28},~{x29},~{x30},~{x31}"() nounwind
```



https://github.com/llvm/llvm-project/pull/167783