refactor(BA-5713): collapse scheduler signatures to owner_id#11047

jopemachine wants to merge 7 commits into

refactor/BA-5650-D-session-repo-owner-idlablup/backend.ai:refactor/BA-5650-D-session-repo-owner-idfrom

refactor/BA-5650-E-scheduler-owner-idlablup/backend.ai:refactor/BA-5650-E-scheduler-owner-idCopy head branch name to clipboard