Temporarily disable code that does not compile on windows (#2386)

And return ENOSYS. We do that so we can at least compile the code on CI.
We'll be gradually enabling more and more functions.

Also, enabled `proc_raise()` for windows.

core/shared/platform/windows/platform_internal.h

@@ -29,6 +29,7 @@
 #include <ws2tcpip.h>
 #include <windows.h>
 #include <basetsd.h>
+#include <signal.h>
 
 #ifdef __cplusplus
 extern "C" {