Update CentOS 8 smoke vm's with vault repositories
Problem: CentOS 8 reached its EOL alongside its public mirrors, making
all the smoke test fail at provisioning time.
Solution: Point all the CentOS repositories to vault.
Signed-off-by: Jonnatan Jossemar Cordero <jonnatan.cordero@suse.com>
- updated `tests/TESTING.md`
- cgroup, snapshotter, and install tests all under tests/vagrant
- cgroup and snapshotter workflows trigger for all code changes on all branches (excluding markdown docs, install script, and other vagrant tests)
- install workflow triggers for relevant script and fixture changes, only on master or pull-requests that target it
- integration and unit test workflows should not trigger for install script changes nor anything under tests/vagrant
Signed-off-by: Jacob Blain Christen <jacob@rancher.com>
