Issue #3512533: Clear fileInput to avoid large file upload failure.

Closes #3512533

s3fs_cors.js

@@ -420,6 +420,9 @@
       fidInput.value = fids.join(' ');
       const numberFileIds = fids.length;
 
+      // Clear file input so FormData won't include the file in the request.
+      fileInput.value = '';
+
       // Post the results to Drupal if all files have been processed.
       const formData = new FormData(form);
       const button = form.querySelector(`.js-form-submit[name^=${fieldName}]`);