Truth Jet Content Fixes, master branch (2021.08.02.)

Removed the constituent information from the truth jets. This was necessary because the information of which truth particles the "InTime" and "OutOfTime" truth jets were created from, can not be properly propagated through our reconstruction chain. So this information is not meant to be saved in the first place. This is meant to fix the problem described in ATLASRECTS-6521.

To do this, the auxiliary information about these jet containers needs to be saved using xAOD::AuxContainerBase, while blacklisting the constituentLinks and constituentWeights variables.

At the same time removed some unnecessary complications from the declarations of the interface containers (xAOD::JetContainer) as well.

Note that for this to work, !45543 (merged) has to be merged in first.