[AArch64] Add MATCH loops to LoopIdiomVectorizePass (llvm#101976)

This patch adds a new loop to LoopIdiomVectorizePass, enabling it to
recognise and vectorise loops such as:
```cpp
template<class InputIt, class ForwardIt>
InputIt find_first_of(InputIt first, InputIt last,
                      ForwardIt s_first, ForwardIt s_last)
{
  for (; first != last; ++first)
    for (ForwardIt it = s_first; it != s_last; ++it)
      if (*first == *it)
        return first;
  return last;
}
```

These loops match the C++ standard library function `std::find_first_of`.

Author: rj-jesus