[aptos-vm] Adjust severity of some error codes. (#5586)

aptos-move/aptos-vm/src/errors.rs

@@ -172,8 +172,9 @@ pub fn expect_only_successful_execution(
         VMStatus::Executed => VMStatus::Executed,
 
         status => {
-            log_context.alert();
-            error!(
+            // Only trigger a warning here as some errors could be a result of the speculative parallel execution.
+            // We will report the errors after we obtained the final transaction output in update_counters_for_processed_chunk
+            warn!(
                 *log_context,
                 "[aptos_vm] Unexpected error from known Move function, '{}'. Error: {:?}",
                 function_name,