[sycl-post-link] Remove padding from DeviceGlobalProperty

[ghost]

As it is described in [1], MemorySanitizer emits an unexpected report
about an uninitialized value when we are reading a structure with
padding as a byte array. The patch implements a workaround:
the type of the DeviceImageScope flag has been replaced with uint32_t
to not require a space for padding. The change should have no impact
on performance and ABI because the size is the same.

[1] llvm/llvm-project#54476

[ghost]

clang-cl.exe crashes during pre-processing USM/hmemll.cpp. This cannot be related to the current changes because the failure occurred in the compiler frontend before the sycl-post-link tool. I've opened a ticket.

[steffenlarsen]

LGTM!

[ghost]

I've opened a ticket for the SYCL :: Basic/parallel_for_indexers.cpp test failure on AMDGPU. There are no device globals and specialization constants in the test, so no properties should be generated at all. This is a little bit strange because the test is marked with XFAIL: hip_amd, so the failure should be expected.