Extend helper assert with generic comparison and print message on success

[rafbiels]

In a recent workshop participants were repeatedly confused by the lack of output in the exercises and kept asking if no output means success. Make the SYCLACADEMY_ASSERT macro print [SUCCESS] Test passed on success and [FAILURE] ... with the same message as before on failure.

There was a lot of code like:

for (int i = 0; i < 1024; ++i) {
  SYCLACADEMY_ASSERT(out[i] == i * 4.0f);
}

It would be silly for the program to print 1024 lines of the same success message, so replace this kind of comparison with a new SYCL_ACADEMY_ASSERT_EQUAL macro which implements a generic comparison function supporting element-wise comparison of arrays/vectors and only calls the SYCLACADEMY_ASSERT once, and therefore prints SUCCESS/FAILURE once.