Issue #3242202: Fix by checking if shell_exec is not in the disable_functions...

Issue #3242202: Fix by checking if shell_exec is not in the disable_functions list and use the Drupal file system service to manage copy or removal of files

Closes #3242202

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ActivityTypes/opigno_file_upload/opigno_file_upload.info.yml

 name: Opigno File Upload
 type: module
 description: Opigno file upload activity type.
-core: 8.x
+core_version_requirement: ^9 || ^10
 package: Opigno
 
 dependencies: