GSF : Use std::array with alignas, instead of AlignedDynArray.

GSF : Use std::array with alignas, instead of AlignedDynArray where applicable. When we anyhow kind of know the max n, which was also the case for AlignedDynArray, and is small we can use a std::array. Small here means ~ 72 elements

Frozen Tier0 seems OK RunTier0Tests.log