mgmt: hawkbit: remove hb_context.status_buffer_size remove hb_context.status_buffer_size and replace it with sizeof(hb_context.status_buffer), because hb_context.status_buffer_size is never set. Signed-off-by: Fin Maaß <f.maass@vogl-electronic.com> (cherry picked from commit 1bea938c9f8c02190daa582144a3cff65e1a12f4)