Add macOS and windows to CI

- macOS
  - system clang
  - gcc
- windows / msys2
  - mingw 64-bit gcc
  - mingw 32-bit gcc
- minor code fixes to get new CI jobs to pass
  - code: suppress unused-parameter warning on 32-bit windows
  - Makefile: if arch=any on macos, don't specify arch at all

fixes https://github.com/official-stockfish/Stockfish/issues/2958

closes https://github.com/official-stockfish/Stockfish/pull/3623

No functional change

src/misc.cpp

@@ -378,6 +378,7 @@ void std_aligned_free(void* ptr) {
 static void* aligned_large_pages_alloc_windows(size_t allocSize) {
 
   #if !defined(_WIN64)
+    (void)allocSize; // suppress unused-parameter compiler warning
     return nullptr;
   #else