[VecOps] Upgrade of the TAdoptAllocator
[VecOps] Upgrade of the TAdoptAllocator

- Better defined == and != operators
- Explicitly defaulted assignments and default/move/copy ctors
- Traits added
- Remove useless fInitialSize data member

root-mirror/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,olifre/root,karies/root,karies/root,karies/root,karies/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,olifre/root,olifre/root,olifre/root,olifre/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root