[SYCLomatic] Guard std min/max from expanding into a min/max macro on Windows

[the-slow-one]

icpx fails to compile the following code on Windows

#include <windows.h>
#include <dpct/dpct.hpp>
int main() { 
  return 0;
}

The compile error indicates the min/max marco expansion (defined in winmindef.h) in DPCT runtime headers.

This PR fixes the issue by preventing preprocessing of min/max using parentheses.