[UR][L0][L0v2] Explicitly mark timestamped events

[kswiecicki]

This is a workaround for a case where L0 driver fails to retrieve a timestamp but doesn't return an error. In such case, when event profiling info is queried we check the timestamp value and assume the event was not timestamped even though it was.
This scenario can happen on newer platform with not yet full driver support.

[kswiecicki]

SYCL pre commit on CUDA fail is unrelated to this PR.

Failed Tests (1):
  SYCL :: KernelCompiler/sycl_device_globals.cpp

[kswiecicki]

Hey @steffenlarsen, could you take a look please.

[steffenlarsen]

Most recent CUDA run fails for known issue: #17650 in nested-non-packed-struct.cpp

[steffenlarsen]

LGTM!

[kswiecicki]

LGTM!

I've mistakenly assumed that the PyTorch issue was with v1 adapter, but looking at the sycl-ls logs, the L0 v2 adapter was used. I've included a corresponding v2 change in this patch.

[kswiecicki]

SYCL Pre Commit on Windows fails with some CI host related issue:

Run Invoke-WebRequest -Uri "https://raw.githubusercontent.com/intel/llvm/refs/heads/sycl/devops/scripts/windows_detect_hung_tests.ps1" -OutFile "windows_detect_hung_tests.ps1" -Headers @{Authorization = "***"}
Test d:\github\_work\llvm\llvm\build-e2e\hostinteroptask\output\host-task-failure.cpp.tmp.out hung!
End Process failed for [8](https://github.com/intel/llvm/actions/runs/18130923540/job/51599696027?pr=20247#step:2:9)048:Access is denied.

I've re-run it a couple of times, but at each attempt, step 2 (Detect hung tests) has failed before even running the tests. I guess its a hung-up test from some job from other PR.