Add directories to exclude-dirs in run-purge.sh
Add directories to exclude-dirs in run-purge.sh

With the component-based promotion pipeline for centos8-master-uc,
we are adding two new promotion names:

- promoted-components
- tripleo-ci-testing

They need to be included in the exclude-dirs option for run-purge.sh.

Change-Id: I9b590cd1eae786a2b96811865f47671bc7c19f1e

javierpena/puppet-delorean,rdo-infra/puppet-dlrn,javierpena/puppet-delorean,rdo-infra/puppet-dlrn,javierpena/puppet-delorean,rdo-infra/puppet-dlrn