Added generic DispatchLevelResult to the MessageDispatchResult (#1670)

* Added generic DispatchLevelResult to the MessageDispatchResult

* Removed unnecessery `Clone + Decode + sp_std::fmt::Debug + Eq` + clippy

bridges/primitives/runtime/src/messages.rs

@@ -22,7 +22,7 @@ use scale_info::TypeInfo;
 
 /// Message dispatch result.
 #[derive(Encode, Decode, RuntimeDebug, Clone, PartialEq, Eq, TypeInfo)]
-pub struct MessageDispatchResult {
+pub struct MessageDispatchResult<DispatchLevelResult> {
 	/// Unspent dispatch weight. This weight that will be deducted from total delivery transaction
 	/// weight, thus reducing the transaction cost. This shall not be zero in (at least) two cases:
 	///
@@ -34,4 +34,6 @@ pub struct MessageDispatchResult {
 	/// configuration supports pay-dispatch-fee-at-target-chain option and message sender has
 	/// enabled this option.
 	pub dispatch_fee_paid_during_dispatch: bool,
+	/// Fine-grained result of single message dispatch (for better diagnostic purposes)
+	pub dispatch_level_result: DispatchLevelResult,
 }