Fix debug info for SYCL zero-dim buffer alloc

[bernhardmgruber]

This fixes a compilation error with the SYCL backend in debug mode.

I also made make_sycl_range and make_sycl_offset support zero-dimensional extents, but this may be unrelated to the issue at hand.

Fixes: #2124

[bernhardmgruber]

@SimeonEhrig the compilation failure that I am fixing here happens when you build with -DCMAKE_BUILD_TYPE=Debug and
-Dalpaka_DEBUG=2. Do we have any CI runs that also test various alpaka debug levels?

[SimeonEhrig]

@SimeonEhrig the compilation failure that I am fixing here happens when you build with -DCMAKE_BUILD_TYPE=Debug and -Dalpaka_DEBUG=2. Do we have any CI runs that also test various alpaka debug levels?

There is one clang analysis job, who uses alpaka_DEBUG=2. The rest uses alpaka_DEBUG=0

https://gitlab.com/hzdr/crp/alpaka/-/jobs/5019152381

[bernhardmgruber]

@SimeonEhrig the compilation failure that I am fixing here happens when you build with -DCMAKE_BUILD_TYPE=Debug and -Dalpaka_DEBUG=2. Do we have any CI runs that also test various alpaka debug levels?

There is one clang analysis job, who uses alpaka_DEBUG=2. The rest uses alpaka_DEBUG=0

https://gitlab.com/hzdr/crp/alpaka/-/jobs/5019152381

Alright, thx! I think we should also have CI jobs that run with alpaka_DEBUG=2. I opened an issue for that: #2130

[AuroraPerego]

memBufTest now passes on the Intel GPU :)