indexer: Add swh bullseye debian repo for runtime dependency
The fossology license indexer requires the fossology-nomossa package.
As a pre-requisite, it was ported from the buster package:
root@pergamon:.../repository# reprepro copy bullseye-swh buster-swh fossology-nomossa Exporting indices... root@pergamon:.../repository# reprepro ls fossology-nomossa | grep bull fossology-nomossa | 3.1-1~bpo10~swh+1 | bullseye-swh | amd64
Related to T4540