Device preferred and native vector width seems to be missing `long long` data type

### Specification Version

SYCL 2020 (Revision 10)

### Section Number(s)

4.6.4.4. Information descriptors

### Bug Description

Looking at [`info::device::preferred_vector_width`](https://registry.khronos.org/SYCL/specs/sycl-2020/html/sycl-2020.html#api:info-device-preferred-vector-width) and [`info::device::native_vector_width`](https://registry.khronos.org/SYCL/specs/sycl-2020/html/sycl-2020.html#api:info-device-native-vector-width), they are both defined for `char`, `short`, `int`, `long`, `float`, `double` and `half` which I assume to be a direct copy of the corresponding query in the OpenCL standard.

However, SYCL is C++, i.e. `long` may as well be `int`. `long long` is a data type that is guaranteed to be at least 64 bits long and it is missing from those device info descriptor.

Start with SYCL 2020 revision 10, section 4.6.4.4, and compare the preferred_vector_width and native_vector_width descriptors with the linked specification entries. Determine whether long long should be included and what wording or descriptor coverage is required; done means the specification's treatment of this type is resolved and documented.

Written by the indexing model from the issue text.