[SYCL] Write tests following the test plan for the work group memory extension

[lbushi25]

This PR adds feature tests as per the work group memory extension test plan.

[gmlueck]

Just curious, why are these explicit instantiations necessary?

[lbushi25]

For some reason, when passing these kernel names to the free function queries with concrete template types, it would complain that these names do not represent kernels because they had not been instantiated yet although one would hope this instantiation would be automatic upon passing these kernel names to the queries.

[gmlueck]

That sounds like either a bug or a missing feature with free function kernels. Can you add the same comment here about removing this code when free function kernels are fully supported?

Alternatively, maybe we should just delay testing of work_group_memory with free function kernels until there is better support for free function kernels. It seems like there are a lot of places where you need to add workarounds for missing features in free function kernels.

[lbushi25]

That sounds like either a bug or a missing feature with free function kernels. Can you add the same comment here about removing this code when free function kernels are fully supported?

Alternatively, maybe we should just delay testing of work_group_memory with free function kernels until there is better support for free function kernels. It seems like there are a lot of places where you need to add workarounds for missing features in free function kernels.

Sure. We can keep the test as I've put an XFAIL directive to expect failures on all platforms since support is not implemented yet.

[steffenlarsen]

LGTM!