[KleidiAI] turn on SME2 by default

[mcr229]

No description provided.

[mcr229]

Stack from ghstack (oldest at bottom):

• -> [KleidiAI] turn on SME2 by default #13233
• [KleidiAI] Always attempt activation packing #13232
• [Profiling] Add python scripts to generate per-op profiling from etdumps #13302
• Add csv and etdump files to gitignore #13301

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/13233

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 4 New Failures

As of commit cfdebbe with merge base a84b3c9 ():

NEW FAILURES - The following jobs have failed:

• Build documentation / build (buck2) / Build doc (gh)
  At least one of the pre-conditions you specified did not hold
• Lint / lintrunner / linux-job (gh)
  >>> Lint for backends/xnnpack/cmake/Dependencies.cmake:
• pull / unittest / macos / macos-job (gh)
  backends/xnnpack/test/ops/test_conv1d.py::TestConv1d::test_qs8_conv1d_batchnorm_seq
• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  backends/arm/test/models/stable_diffusion/test_vae_AutoencoderKL.py::TestAutoencoderKL::test_AutoencoderKL_tosa_INT

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[digantdesai]

Move around the comment?

[digantdesai]

What's the test plan? Assuming Kleidi folks have tested the kernel and the XNNPACK path to the kernel is ~shared?

[mcr229]

What's the test plan? Assuming Kleidi folks have tested the kernel and the XNNPACK path to the kernel is ~shared?

cc. @mergennachin for the test plan around SME2 kernels.