Added a intro page for SUSE Observability

Signed-off-by: Gunasekhar Matamalam <gunasekhar.matamalam@suse.com>

versioned_sidebars/version-2.9-sidebars.json

@@ -1116,6 +1116,7 @@
             "integrations-in-rancher/neuvector/overview"
           ]
         },
+        "integrations-in-rancher/suse-observability/suse-observability",
         "integrations-in-rancher/kubewarden/kubewarden",
         "integrations-in-rancher/elemental/elemental",
         {