Fix some tests

Author: Fokko

crates/iceberg/src/expr/visitors/manifest_evaluator.rs

@@ -258,7 +258,7 @@ impl BoundPredicateVisitor for ManifestFilterVisitor<'_> {
                 lower_bound_bytes,
                 *reference.field().field_type.clone(),
             );
-            if datum > &lower_bound {
+            if &lower_bound > datum {
                 return ROWS_CANNOT_MATCH;
             }
         }
@@ -268,7 +268,7 @@ impl BoundPredicateVisitor for ManifestFilterVisitor<'_> {
                 upper_bound_bytes,
                 *reference.field().field_type.clone(),
             );
-            if datum < &upper_bound {
+            if &upper_bound < datum {
                 return ROWS_CANNOT_MATCH;
             }
         }