Merge branch 'mergify/bp/0.44.0/pr-3857' (#3861)

* origin/mergify/bp/0.44.0/pr-3857:
  Changelog #3857
  Removes unused `Success` event
  Adds test for identical events in batch
  Adds batch events tests
  Removes eprintln from prepare proposal unit tests
  Adds tests for whitelisted tokens gas payment

.changelog/unreleased/testing/3857-batch-events-tests.md

@@ -0,0 +1,2 @@
+- Added testing for batched tx events.
+  ([\#3857](https://github.com/anoma/namada/pull/3857))

crates/events/src/extend.rs

@@ -542,20 +542,6 @@ impl EventAttributeEntry<'static> for MaspDataRefs {
     }
 }
 
-/// Extend an [`Event`] with success data.
-pub struct Success(pub bool);
-
-impl EventAttributeEntry<'static> for Success {
-    type Value = bool;
-    type ValueOwned = Self::Value;
-
-    const KEY: &'static str = "success";
-
-    fn into_value(self) -> Self::Value {
-        self.0
-    }
-}
-
 /// Extend an [`Event`] with a new domain.
 pub struct Domain<E>(PhantomData<E>);