Add listener client authentication scenario tests

This patch adds scenario tests that cover the listener client
authentication features of TLS_TERMINATED listeners.

Depends-On: https://review.opendev.org/#/c/693586/
Change-Id: Ic3a9fa1995709378b68e64aea51e1799867c1bb0
diff --git a/releasenotes/notes/client-auth-scenario-bffa420a2fd38159.yaml b/releasenotes/notes/client-auth-scenario-bffa420a2fd38159.yaml
new file mode 100644
index 0000000..3e44be4
--- /dev/null
+++ b/releasenotes/notes/client-auth-scenario-bffa420a2fd38159.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Adds scenario tests for listener client authentication.