[executorch hash update] update the pinned executorch hash (#144813)

This PR is auto-generated nightly by [this action](https://github.com/pytorch/pytorch/blob/main/.github/workflows/nightly.yml).
Update the pinned executorch hash.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/144813
Approved by: https://github.com/pytorchbot, https://github.com/huydhn

Co-authored-by: Huy Do <huydhn@gmail.com>

.ci/docker/ci_commit_pins/executorch.txt

@@ -1 +1 @@
-cf8d0cf8ebd93bc3012b31bfd6ab768a493f4479
+a727b55b3584c9f6330eae3c4762a2ca500247dc

.ci/docker/common/install_executorch.sh

@@ -38,6 +38,11 @@ install_conda_dependencies() {
 install_pip_dependencies() {
   pushd executorch
   as_jenkins bash install_requirements.sh --pybind xnnpack
+
+  # A workaround, ExecuTorch has moved to numpy 2.0 which is not compatible with the current
+  # numba and scipy version used in PyTorch CI
+  conda_run pip uninstall -y numba scipy
+
   popd
 }