Correct 'PartialOrd' implementation for 'PruneCandidate'

The previous implementation used 'Ordering::reverse' incorrectly, potentially leading to incorrect element ordering. The corrected code now properly returns the result of 'self.cmp(other)', aligning with the 'PartialOrd' trait's requirements for element comparisons.

Signed-off-by: Joseph Livesey <jlivesey@gmail.com>

validator/src/state/state_pruning_manager.rs

@@ -49,7 +49,7 @@ impl Ord for PruneCandidate {
 
 impl PartialOrd for PruneCandidate {
     fn partial_cmp(&self, other: &PruneCandidate) -> Option<Ordering> {
-        Some(Ordering::reverse(self.0.cmp(&other.0)))
+        Some(self.cmp(other))
     }
 }