Git commits in Moodle 3.11.x by Septatrix

commit a05e94a03ed72b5087bdd5a938a689e48a9d3220
Author: Septatrix <24257556+Septatrix@users.noreply.github.com>
Date:   Sat, 17 Apr 2021 18:49:15 +0800
Tag:    v3.11.0-beta

MDL-70110 assign: add group submission attemptnumber test