Fix clang-tidy error: clang-analyzer-cplusplus.NewDelete

[yh-sb]

It occurs when arg is used later after delete arg;. clang-tidy doesn't understand that there is an exception thrown after delete.

It leads to the following clang-tidy errors in the main project:

...\include\boost/asio/detail/impl/win_thread.ipp:79:20: error: Use of memory after it is freed [clang-analyzer-cplusplus.NewDelete,-warnings-as-errors]
   79 | arg->exit_event_ = exit_event_ = ::CreateEventW(0, true, false, 0);
      |                                ^

...\include\boost/asio/detail/impl/win_thread.ipp:90:38: error: Use of memory after it is freed [clang-analyzer-cplusplus.NewDelete,-warnings-as-errors]
   90 |   thread_ = reinterpret_cast<HANDLE>(::_beginthreadex(0,
      |                                      ^