[SYCL] Updated tests to comply with SYCL 2020 aspect list

[andylshort]

This patch updates the E2E tests to account for the changes made to aspects in Section 4.6.4.3 of the specification:

• The concept of a "host" device no longer exists in SYCL 2020 - any host should now be a cpu, so the aspect has been deprecated accordingly.
• usm_restricted_shared_allocations has been removed.
• usm_system_allocator has been renamed usm_system_allocations.
• int64_* aspects were replaced with atomic64, so no longer should be tested.

(May require https://github.com/intel/llvm/pull/8751 but should pass without.)

[steffenlarsen]

Test changes are valid without new changes to intel/llvm. Merging these.