[Functional/fullstack] Remove tools from irrelevant list

For functional and fullstack jobs tools/ is in the irrelevant list, thus
even if configure_for_func_testing.sh is changed none of these jobs are
executed.

Change-Id: I3fb7e162c92b0316b16c8af92831b7050a9727d8
Related-Bug: #1957936

zuul.d/base.yaml

@@ -21,7 +21,6 @@
       - ^neutron/tests/fullstack/.*$
       - ^releasenotes/.*$
       - ^setup.cfg$
-      - ^tools/.*$
       - ^vagrant/.*$
       - ^devstack/.*\.sample$
       - ^playbooks/.*$
@@ -69,7 +68,6 @@
       - ^neutron/locale/.*$
       - ^neutron/tests/unit/.*$
       - ^neutron/tests/functional/.*$
-      - ^tools/.*$
       - ^neutron/agent/ovn/.*$
       - ^neutron/agent/windows/.*$
       - ^neutron/plugins/ml2/drivers/macvtap/.*$