Fix button callback logic (#4502)

InvenTree/stock/templates/stock/item.html

@@ -259,11 +259,9 @@
         $("#test-result-table").bootstrapTable("refresh");
     }
 
-    {% if item.has_test_reports %}
     $("#test-report").click(function() {
         printTestReports([{{ item.pk }}]);
     });
-    {% endif %}
 
     {% if user.is_staff %}
     $("#delete-test-results").click(function() {