MDL-66743 backup: reports should be able to backup module-level data

backup/moodle2/backup_stepslib.php

@@ -285,6 +285,9 @@ class backup_module_structure_step extends backup_structure_step {
         // attach format plugin structure to $module element, only one allowed
         $this->add_plugin_structure('format', $module, false);
 
+        // Attach report plugin structure to $module element, multiple allowed.
+        $this->add_plugin_structure('report', $module, true);
+
         // attach plagiarism plugin structure to $module element, there can be potentially
         // many plagiarism plugins storing information about this course
         $this->add_plugin_structure('plagiarism', $module, true);

backup/moodle2/restore_stepslib.php

@@ -4180,6 +4180,9 @@ class restore_module_structure_step extends restore_structure_step {
         // Apply for 'format' plugins optional paths at module level
         $this->add_plugin_structure('format', $module);
 
+        // Apply for 'report' plugins optional paths at module level.
+        $this->add_plugin_structure('report', $module);
+
         // Apply for 'plagiarism' plugins optional paths at module level
         $this->add_plugin_structure('plagiarism', $module);