Updated rake task to add participants in admin_sets

added Ready for review label

requested review from @anusha

assigned to @kapill65chhpatel

added Blocked label and removed Ready for review label

changed the description

This merge request is no longer necessary because it has already been implemented here.

This MR is succeeded by https://gitlab.ruhr-uni-bochum.de/FDM/rdm-system/rdms/-/merge_requests/195

closed