Remove boost dependencies from ::o3tl::cow_wrapper, and add
the necessary includes to files including checked_delete and
noncopyable that do not already include the necessary files.

Change-Id: Iedae4232002792724226829a5d5cf9d16ffd0686
Reviewed-on: https://gerrit.libreoffice.org/18125Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>