gh-121698 Use updated WebAssembly type reflection proposal

Author: hoodmane

Python/emscripten_trampoline.c

@@ -43,7 +43,7 @@ EM_JS(int, _PyEM_CountFuncParams, (PyCFunctionWithKeywords func),
     if (n !== undefined) {
         return n;
     }
-    n = WebAssembly.Function.type(wasmTable.get(func)).parameters.length;
+    n = wasmTable.get(func).type().parameters.length;
     _PyEM_CountFuncParams.cache.set(func, n);
     return n;
 }