Running from an installed version of ansible-test now results in tests using a dedicated directory for PYTHONPATH instead of using the site-packages directory where ansible is installed.
This provides consistency with tests running from source, which already used a dedicated directory.
Resolves https://github.com/ansible/ansible/issues/62716
(cherry picked from commit 831e1bf2e0)
Co-authored-by: Matt Clay <matt@mystile.com>
