fix(model): set isNew to false for documents that were successfully inserted by insertMany with ordered = false when an error occurred

Fix #9677

Author: vkarpov15

lib/model.js

@@ -3332,9 +3332,13 @@ Model.$__insertMany = function(arr, options, callback) {
 
         // `insertedDocs` is a Mongoose-specific property
         const erroredIndexes = new Set(get(error, 'writeErrors', []).map(err => err.index));
-        error.insertedDocs = docAttributes.filter((doc, i) => {
-          return !erroredIndexes.has(i);
-        });
+        error.insertedDocs = docAttributes.
+          filter((doc, i) => !erroredIndexes.has(i)).
+          map(function setIsNewForInsertedDoc(doc) {
+            doc.$__reset();
+            _setIsNew(doc, false);
+            return doc;
+          });
 
         callback(error, null);
         return;