Fix pip install . -e when buck2 is not installed

Update CMakeLists.txt

Co-authored-by: jathu <jathu.satkunarajah@gmail.com>

Update

[ghstack-poisoned]

Fix demo app as well

Merge branch 'main' into sqrt_tensor

NXP backend: Enable initial unit tests workflow (#11396)

### Summary
Initial workflow definition for running unit tests for Neutron (NXP)
backend.

Follow up for the #11109, our
IT updated the eIQ PyPI, so the neutron-converter python package shall
be reachable using the executorch's self-hosted agents too.

@digantdesai , @mergennachin as the problem was only reproduced with the
self-hosted agents used by the ExecuTorch/PyTorch, I need your help to
verify the IT change. Can you please let run the "trunk" workflow?


cc @digantdesai @JakeStevens

Co-authored-by: Lukas Sztefek <lukas.sztefek@nxp.com>

Merge branch 'main' into use-quantize_

init

Update

[ghstack-poisoned]

Use ExternalProject_Add to build tokenizers

This way it avoids the CMake target name collision between XNNPACK's
`memory` and Abseil's `memory`