when class defines copy/move ctor then corresponding assign operator(s)
should be defined or deleted
Signed-off-by: Mateusz Jablonski <mateusz.jablonski@intel.com>
Dates corrected in copyright headers to reflect original publication date
(2018 for OpenCL, 2020 for Level Zero).
Signed-off-by: lgotszal <lukasz.gotszald@intel.com>