Mandate weight annotation (#5357)

* Disallow default weight

* Fix build and test

* Fix tests

* Fix another beloved ui test.

* fix beloved trybuild tests

* fix treasury?

* Final test fix

* Fix build

* Fix another one

* Fix

* More doctest fix

substrate/frame/support/test/tests/instance.rs

@@ -55,6 +55,7 @@ mod module1 {
 
 			fn deposit_event() = default;
 
+			#[weight = frame_support::weights::SimpleDispatchInfo::default()]
 			fn one(origin) {
 				system::ensure_root(origin)?;
 				Self::deposit_event(RawEvent::AnotherVariant(3));