[llvm] Reapply "[coro][CoroSplit] Use `llvm.lifetime.end` to compute putting objects on the frame vs the stack (#90265) (PR #91372)

[Chuanqi Xu via llvm-commits]

https://github.com/ChuanqiXu9 commented:

The code duplication is slightly not good. Can we try to mitigate such problems by some template techniques?

For example, (may be):

```
if constexpr (isMany) {
    if (StopSet.contains(BB))
      return true;
} else {
    if (BB == StopBB) // or BB == *StopSet.begin()
      return true;
}
```

https://github.com/llvm/llvm-project/pull/91372