DPC++ daily 2021-09-06

[SYCL] Mark sycl::marray device copyable (#4427)

sycl::marray is device copyable if the element type is device copyable.
Also test was added to verify that the following types are device copyable:
 - sycl::marray<T> when T is device copyable;
 - sycl::vec<T> (all supported element types are device copyable);
 - sycl::id;
 - sycl::range.