contracts: Emit event on contract termination (#8014)

* contracts: Remove redundant bool argument from the eviction event

* contracts: Improve event documentation

* contracts: Emit event on contract termination

substrate/frame/contracts/src/exec.rs

@@ -582,6 +582,7 @@ where
 		)?;
 		if let Some(ContractInfo::Alive(info)) = ContractInfoOf::<T>::take(&self_id) {
 			Storage::<T>::queue_trie_for_deletion(&info)?;
+			Contracts::<T>::deposit_event(RawEvent::Terminated(self_id, beneficiary.clone()));
 			Ok(())
 		} else {
 			panic!(
@@ -671,7 +672,7 @@ where
 	fn deposit_event(&mut self, topics: Vec<T::Hash>, data: Vec<u8>) {
 		deposit_event::<Self::T>(
 			topics,
-			RawEvent::ContractExecution(self.ctx.self_account.clone(), data)
+			RawEvent::ContractEmitted(self.ctx.self_account.clone(), data)
 		);
 	}