Sweeping !20024 from 21.3 to 21.9. Adding MM and STGC clusterization packages for the NSW, with interfaces and example tools

Atlas Nightlybuildrequested to merge
cherry-pick-56e7fa9141-21.9 into 21.9

Adding MM and STGC clusterization packages for the NSW, with interfaces and example tools

See merge request !20024 (merged)

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