[SYCL][NFC] Drop Gen9 detection from E2E tests

[AlexeySachkov]

Gen9 HW is not officially supported anymore by our product, we don't have such machines in our CI and therefore it doesn't make sense to keep those legacy LIT features and their usage.

[AlexeySachkov]

I'm submitting this as a draft for now to wait for #14451 to reduce amount of conflicts. However, I think that it worth to do an early review of removed files.

@intel/dpcpp-esimd-reviewers, could you please take a look at them? I simply removed them because they require gen9 and nothing else, but I'm not that familiar with ESIMD to say for sure that it was a correct decision and we shouldn't rewrite those tests instead.

[sarnex]

im gonna add new tests for gen12 soon, this test is dead so its okay to remove it

[sarnex]

esimd lgtm

[sarnex]

im gonna add new tests for gen12 soon, this test is dead so its okay to remove it

[AlexeySachkov]

I cannot approve my own PR, but my comments about recent changes were addressed, so I'm fine with merging this.

[steffenlarsen]

Primary changes since approvals were that the bfloat16_example has been split into separate files to avoid simplify the cpu/gpu conditional runs/builds.

@sarnex | @kbenzie | @againull - Would you like to re-review?

[sarnex]

esimd lgtm

[steffenlarsen]

Thank you, @sarnex ! Since there were no other reactions, we will proceed with the merge. Please feel free to do a post-commit review and we will address it in a separate patch.

[AlexeySachkov]

This PR broke post-commit on AMD, the fix is in #15533