-Wdangling-field detects view members initalized from a by-value owner parameter

```
struct Foo {};
struct Bar {
const Foo& foo;
Bar(Foo f ) : foo(f) {} // good, clang warn on this case
};

struct C {
string_view s;
C(std::string c) : s(c) {} // bad, clang doesn't warn on this case. support it
};
```