[llvm] [WebAssembly] remove instruction after builtin trap (PR #90207)

[Congcong Cai via llvm-commits]

HerrCai0907 wrote:

In AArch64, 
```
def : Pat<(trap), (BRK 1)>;
def : Pat<(debugtrap), (BRK 0xF000)>;
let isTrap = 1 in {
def BRK   : ExceptionGeneration<0b001, 0b00, "brk",
                                [(int_aarch64_break timm32_0_65535:$imm)]>;
}
```

https://github.com/llvm/llvm-project/pull/90207