Fix assertion failure during conversion function overload resolution. (#98671)

When clang is built with assertions, an otherwise silent (and seemingly
innocuous) assertion failure from `SemaConcept.cpp` is triggered by the
following program:

```cpp
struct S {
  operator int();
  template <typename T> operator T();
};

constexpr auto r = &S::operator int;
```

The function in question compares the "constrained-ness" of `S::operator
int` and `S::operator T<int>`; the template kind of the former is
`TK_NonTemplate`, whereas the template kind of the later is
`TK_FunctionTemplateSpecialization`. The later kind is not "expected" by
the function, thus the assertion-failure.

0 files changed, 0 insertions, 0 deletions