src: use __FUNCSIG__ on Windows in backtrace

To show function signature if possible.

PR-URL: #53135
Refs: https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-170
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Stefan Stojanovic <stefan.stojanovic@janeasystems.com>

src/util.h

@@ -163,8 +163,12 @@ void DumpJavaScriptBacktrace(FILE* fp);
 #else
 #define LIKELY(expr) expr
 #define UNLIKELY(expr) expr
+#if defined(_MSC_VER)
+#define PRETTY_FUNCTION_NAME __FUNCSIG__
+#else
 #define PRETTY_FUNCTION_NAME ""
 #endif
+#endif
 
 #define STRINGIFY_(x) #x
 #define STRINGIFY(x) STRINGIFY_(x)