drop Particle::daughtersVector and Particle::daughtersVectorNoCopy

• remove Particle::daughtersVectorNoCopy as it is just another way of spelling Particle::daughters
• remove Particle::daughtersVector in favor of a utility function to explicitly convert a range to a specified container type, as the implicit conversion is not always needed, and was often used without need (and at the cost of a heap allocation). Instead, if a caller really needs a different container type, they can explicitly convert.

goes together with Rec!4390 (merged) and Moore!4918 (merged)