docs: add the testing glossary in the toctree
docs: add the testing glossary in the toctree

Signed-off-by: Alfredo Deza <3f4d00ffa77e6441ab2d23c25a618925d2383b02@redhat.com>

jtaleric/ceph-ansible,albertomurillo/ceph-ansible,font/ceph-ansible,fgal/ceph-ansible,font/ceph-ansible,WingkaiHo/ceph-ansible,fgal/ceph-ansible,jtaleric/ceph-ansible,albertomurillo/ceph-ansible,albertomurillo/ceph-ansible,bengland2/ceph-ansible,ceph/ceph-ansible,WingkaiHo/ceph-ansible,travmi/ceph-ansible,ceph/ceph-ansible,bengland2/ceph-ansible,travmi/ceph-ansible,WingkaiHo/ceph-ansible