If kolla-ansible is installed via pip install --user, currently the
kolla-ansible script is unable to locate the installed playbooks.
This leads to a failure when running commands.
This change fixes the issue by checking for the user's .local directory
as a possible installation path.
This fixes some of the scenario tests which were failing after switching
to a user installation in Ifaf1948ed5d42eebaa62d7bad375bbfc12b134d5.
Most tests did not fail since the kolla-ansible script in the source
checkout was used.
Closes-Bug: #1915527
Change-Id: I5b47a146627d06bb3fe4a747c5f20290c726b0f9