refactor XNNPACK's ukernel config srcs

[mcr229]

refactoring XNNPACK's ukernel config srcs

[mcr229]

Stack from ghstack (oldest at bottom):

• Move xnnpack to 5220835694 #12412
• -> refactor XNNPACK's ukernel config srcs #12411

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12411

• 📄 Preview Python docs built from this PR

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⏳ 3 Pending, 4 Unrelated Failures

As of commit 9ee00c7 with merge base 34bcc23 ():

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest / linux / linux-job (gh) (trunk failure)
  devtools/inspector/tests/inspector_utils_test.py::TestInspectorUtils::test_equip_debug_handle_to_export_program_success
• pull / unittest / macos / macos-job (gh) (trunk failure)
  devtools/inspector/tests/inspector_utils_test.py::TestInspectorUtils::test_equip_debug_handle_to_export_program_success
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)
  devtools/inspector/tests/inspector_utils_test.py::TestInspectorUtils::test_equip_debug_handle_to_export_program_success
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  devtools/inspector/tests/inspector_utils_test.py::TestInspectorUtils::test_equip_debug_handle_to_export_program_success

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[mcr229]

@pytorchbot cherry-pick --onto release/0.7 -c fixnewfeature

[pytorchbot]

Cherry picking #12411

The cherry pick PR is at #12453 and it is recommended to link a fixnewfeature cherry pick PR with an issue. The following tracker issues are updated:

• [v0.7.0] Release Tracker #11075 (comment)

Details for Dev Infra team

Raised by workflow job