[SYCL] Enable JIT tests relying on debug output

[jchlanda]

Wrap the tests in REQUIRE: asserts in order to make sure that the compiler can generate the messages.

Also make sure we don't run the e2e tests on windows, as JIT is not supported there.

[jchlanda]

Fixes #14783

[maarquitos14]

LGTM.

[jchlanda]

I had to introduce a dedicated feature has_ndebug in order to be able to reliably test the debug output. I decided to remove the debug test form sycl-fusion's directory, as in order to enable a has_ndebug feature there we would first need to teach it about the dpcpp_compiler and that seemed like too much of a hustle for this purpose.

@ldrumm, you might want to have a quick look at this, thank you!

[jchlanda]

Fixes #14989

[jchlanda]

Friendly ping @sarnex (and @maarquitos14, somehow your previous 👍 disappeared).

Thank you.

[jchlanda]

@intel/llvm-gatekeepers this should be ready to go, thank you.