Fix Brunnhildar Prisoner react state. Add missing aura to Dead Frost Giant and Frostworg Carcass, and remove random movements Fix react state for Brunnhildar Warbear, Frostworg and Niffelem Frost Giant, and add SAI scripts. Fix inhabittype for some npcs trigger. Closes #15635 Closes #15634 (cherry picked from commit 3e01ec1f22b3989c2b0c4d44ab62f30000b0ed08)