Update base for Update on "[Executorch][CI] Fix qnn runner ci job scripts"

QNN backend's AOT artifacts were being copied in the source directory instead of
them being installed, as build artifacts, in appropriate package directory.

As a result we had to use PYTHON_PATH=".." in test_llama.sh CI script when
running CI for qnn. This results in executorch having two locations as where
the package is installed. This PR fixes that.

Differential Revision: [D66406274](https://our.internmc.facebook.com/intern/diff/D66406274/)

[ghstack-poisoned]

Author: kimishpatel