Add compile fail test

Author: MrGVSV

crates/bevy_reflect/compile_fail/tests/into_function/closure_fail.rs

@@ -0,0 +1,20 @@
+//@no-rustfix
+#![allow(unused)]
+
+use bevy_reflect::func::IntoFunction;
+use bevy_reflect::Reflect;
+
+fn main() {
+    let value = String::from("Hello, World!");
+    let closure_capture_owned = move || println!("{}", value);
+
+    // Should pass:
+    let _ = closure_capture_owned.into_function();
+
+    let value = String::from("Hello, World!");
+    let closure_capture_reference = || println!("{}", &value);
+    //~^ E0373
+
+    // Above error due to this line:
+    let _ = closure_capture_reference.into_function();
+}