distro/tests: add dnstap test

distro/tests/ansible-roles/knot_resolver/tasks/configure_dnstap.yaml

+---
+# SPDX-License-Identifier: GPL-3.0-or-later
+- name: dnstap_config set up kresd.conf
+  blockinfile:
+    marker: -- {mark} ANSIBLE MANAGED BLOCK
+    block: |
+      modules.load('dnstap')
+      assert(dnstap)
+    path: /etc/knot-resolver/kresd.conf
+    insertbefore: BOF

distro/tests/ansible-roles/knot_resolver/tasks/main.yaml

@@ -46,6 +46,16 @@
         - include: test_doh.yaml
       when: distro in ["Fedora", "Debian", "CentOS"] or (distro == "Ubuntu" and ansible_distribution_major_version|int >= 18)
 
+    - name: Test dnstap module
+      block:
+        - name: Install knot-resolver-module-dnstap
+          package:
+            name: knot-resolver-module-dnstap
+            state: latest
+        - include: configure_dnstap.yaml
+        - include: restart_kresd.yaml
+      when: distro in ["Fedora", "Debian", "CentOS", "Ubuntu"]
+
   always:
 
     - name: Get installed package version