Suggest [[clang::lifetimebound]] for function parameters of reference type

[usx95]

const int& Identity(const int& a) {
  return a;
}

Suggest 'a' to be marked lifetimebound.

[llvmbot]

@llvm/issue-subscribers-clang-temporal-safety

Author: Utkarsh Saxena (usx95)

```cpp const int& Identity(const int& a) { return a; } ``` Suggest 'a' to be marked lifetimebound.