[SYCL] Add logics for aligned_alloc_xxx<T> to deal with unsupported Alignment argument

[HPS-1]

Added logics for aligned_alloc_xxx<T> to return nullptr when the Alignment argument is not a power of 2. Also updated and added a new test file align.cpp used to test such cases (where Alignment is not 2's power). The fixed methods, all in sycl/include/sycl/usm.hpp, are:
aligned_alloc_device<T>
aligned_alloc_shared<T>
aligned_alloc_host<T>
aligned_alloc<T>

*Note that each of these methods has two slighly different versions with different parameter lists.

**Also note that Alignment=0 is considered as a valid "default" case in our implementation so it will not cause nullptr to be returned. (Code here:

llvm/sycl/source/detail/usm/usm_impl.cpp

Line 163 in 435845b

if (!Alignment) {

) (Also if we let these methods return nullptr when Alignment=0, test SYCL :: Annotated_usm/annotated_usm_kind.cpp will fail.)

Link to the issue: #11642

[github-actions]

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