Companion for polkadot#7234 (XCM: Tools for uniquely referencing messages) (#2601)

* Fixes for new API

* Formatting

* Fixes

* Fixes

* Further fixes

* XCMP dispatch events mention message ID

* XCMP event includes ID

* Add DMP message ID functionality

* Integrate into test parachains

* Remove WithUniqueTopic usage

* Use new primitive

* Formatting

* undiener

* Revert lock

* Fixes

* Fixes

* Fixes

* Fixes

* Formatting

* message_hash becomes message_id

* Rename

* Another Rename

* Fixes

* Fix

* Bump

* Fixes

* Grumble.

cumulus/primitives/utility/src/lib.rs

@@ -288,7 +288,7 @@ impl<
 				&(X1(AccountId32 { network: None, id: receiver.into() }).into()),
 				// We aren't able to track the XCM that initiated the fee deposit, so we create a
 				// fake message hash here
-				&XcmContext::with_message_hash([0; 32]),
+				&XcmContext::with_message_id([0; 32]),
 			)
 			.is_ok();