Fix benchmarks compilation (#2941)

linera-chain/src/data_types.rs

@@ -488,7 +488,7 @@ pub struct LiteVote {
 
 impl LiteVote {
     /// Returns the full vote, with the value, if it matches.
-    #[cfg(with_testing)]
+    #[cfg(any(feature = "benchmark", with_testing))]
     pub fn with_value<T>(self, value: Hashed<T>) -> Option<Vote<T>> {
         if self.value.value_hash != value.hash() {
             return None;