[clang] [clang-tools-extra] [libcxx] Reland "[clang] Enable sized deallocation by default in C++14 onwards" (PR #90373)

[Pengcheng Wang via cfe-commits]

wangpc-pp wrote:

Thanks @vitalybuka! After some investigations, I think this PR just uncovered 
the existed ASAN problem.
```cpp
#if !defined(__cpp_sized_deallocation) || __cpp_sized_deallocation < 201309L
#  define _LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION
#endif

#if !defined(_LIBCPP_BUILDING_LIBRARY) && _LIBCPP_STD_VER < 14 && 
defined(_LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION)
#  define _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
#endif

#if defined(_LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION) || 
defined(_LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION)
#  define _LIBCPP_HAS_NO_SIZED_DEALLOCATION
#endif

template <class... _Args>
_LIBCPP_HIDE_FROM_ABI void __do_deallocate_handle_size(void* __ptr, size_t 
__size, _Args... __args) {
#ifdef _LIBCPP_HAS_NO_SIZED_DEALLOCATION
  (void)__size;
  return std::__libcpp_operator_delete(__ptr, __args...);
#else
  return std::__libcpp_operator_delete(__ptr, __size, __args...);
#endif
}
```
The `__do_deallocate_handle_size` ignored the `__size` before this PR.

https://github.com/llvm/llvm-project/pull/90373
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