TESTS: Fix the ssh configuration - II

The previous patch fixed the environment for the multihost tests, but
system tests also need the fix.

This fix will become obsolete and should be removed when FreeIPA
adapts the ipa-client-install tool to use the sss_ssh_knownhosts tool.

.github/workflows/ci.yml

@@ -339,6 +339,17 @@ jobs:
 
           systemctl restart sssd || systemctl status sssd
 
+    - name: Patch the SSH configuration
+      uses: SSSD/sssd-ci-containers/actions/exec@master
+      with:
+        user: root
+        script: |
+          #!/bin/bash
+          test -x /usr/bin/sss_ssh_knownhosts && \
+              sed -e 's/GlobalKnownHostsFile/#GlobalKnownHostsFile/' \
+                  -e 's/ProxyCommand \/usr\/bin\/sss_ssh_knownhostsproxy -p %p %h/KnownHostsCommand \/usr\/bin\/sss_ssh_knownhosts %H/' \
+                  -i /etc/ssh/ssh_config.d/04-ipa.conf
+
     - name: Install system tests dependencies
       shell: bash
       working-directory: ./sssd/src/tests/system