Fix EL Integration Tests

Author: ethDreamer

testing/execution_engine_integration/src/test_rig.rs

@@ -463,6 +463,14 @@ impl<Engine: GenericExecutionEngine> TestRig<Engine> {
 
         // TODO: again think about forks here
         let mut invalid_payload = valid_payload.clone();
+        // reverse the block hash to bypass the new payload cache
+        let reversed: [u8; 32] = {
+            let mut arr = [0; 32];
+            arr.copy_from_slice(invalid_payload.block_hash().0.as_slice());
+            arr.reverse();
+            arr
+        };
+        *invalid_payload.block_hash_mut().0 = reversed;
         *invalid_payload.prev_randao_mut() = Hash256::from_low_u64_be(42);
         let status = self
             .ee_a