[coro] Merge two almost identical tests (#89928)

llvm/test/Transforms/Coroutines/coro-split-musttail10.ll and
coro-split-musttail11.ll were the same except for the triple.

Also add a requires clause.

Author: zmodem

llvm/test/Transforms/Coroutines/coro-split-musttail10.ll

@@ -1,9 +1,12 @@
 ; Tests that we would convert coro.resume to a musttail call if the target is
-; Wasm64 with tail-call support.
-; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
-; RUN: opt < %s -passes='pgo-instr-gen,cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
+; Wasm64 or Wasm32 with tail-call support.
+; REQUIRES: webassembly-registered-target
 
-target triple = "wasm64-unknown-unknown"
+; RUN: opt -mtriple=wasm64-unknown-unknown < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
+; RUN: opt -mtriple=wasm64-unknown-unknown < %s -passes='pgo-instr-gen,cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
+
+; RUN: opt -mtriple=wasm32-unknown-unknown < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
+; RUN: opt -mtriple=wasm32-unknown-unknown < %s -passes='pgo-instr-gen,cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
 
 define void @f() #0 {
 entry: