Port event.c to SDL3

Author: ankith26

src_c/_pygame.h

@@ -308,8 +308,10 @@ typedef enum {
     PGPOST_CONTROLLERTOUCHPADMOTION,
     PGPOST_CONTROLLERTOUCHPADUP,
     PGPOST_CONTROLLERSENSORUPDATE,
+#if !SDL_VERSION_ATLEAST(3, 0, 0)
     PGPOST_DOLLARGESTURE,
     PGPOST_DOLLARRECORD,
+#endif
     PGPOST_DROPFILE,
     PGPOST_DROPTEXT,
     PGPOST_DROPBEGIN,
@@ -334,7 +336,9 @@ typedef enum {
     PGPOST_MOUSEBUTTONDOWN,
     PGPOST_MOUSEBUTTONUP,
     PGPOST_MOUSEWHEEL,
+#if !SDL_VERSION_ATLEAST(3, 0, 0)
     PGPOST_MULTIGESTURE,
+#endif
     PGPOST_NOEVENT,
     PGPOST_QUIT,
     PGPOST_RENDER_TARGETS_RESET,