(1) Migrated all still existing binary load/save stuff
in SfxPoolItem to legacy files. Isolated from Item
implementations. Adapted all usages. No more methods
Create/Store needed, also GetVersion removed

(2) Removed operator= for SfxPoolItem. Adapted all
usages. Goal ist to handle Items more as Objects
('Object-Oriented') in the sense to move/handle
instances, not to copy one instance over another one
(which is more and more problematic with hard to copy
content as UNO API stuff or similar). This lead to
much more usages of std::shared_ptr which correlates
well with future plans fr Items (see dev branch).
Next logic step will be to also remove copy constructor

Linux build and corrections done
Fixed Writer test and removed unused defines
Fixed another unused m,acro
Started to unify the AutoFormat stuff
Changes to OUString constructor usages, tests completely
No idea why, but SfxStringItem constructor which
takes a OUString& now insists of not getting ::OUString's
handed in - changed all 'SfxStringItem.*OUString.*".*"'
accordingly

Change-Id: Ibed7358b18fb019994a7490332b9d797a6694c29
Reviewed-on: https://gerrit.libreoffice.org/71075
Tested-by: Jenkins
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>