Port SDL3 release scripts to SDL2

[skip ci]

cmake/test/sdltest.c

@@ -0,0 +1,9 @@
+#include "SDL.h"
+#include "SDL_test.h"
+
+
+int main(int argc, char *argv[]) {
+    SDLTest_CommonState state;
+    SDLTest_CommonDefaultArgs(&state, argc, argv);
+    return 0;
+}