move istio docs from external-addons to multi-tenancy component (#…

…3555)

* move istio from `external-addons` to `multi-tenancy` component

Signed-off-by: Mathew Wicks <thesuperzapper@users.noreply.github.com>

* also redirect the root istio page

Signed-off-by: Mathew Wicks <thesuperzapper@users.noreply.github.com>

* remove unneeded redirect

Signed-off-by: Mathew Wicks <thesuperzapper@users.noreply.github.com>

---------

Signed-off-by: Mathew Wicks <thesuperzapper@users.noreply.github.com>
Co-authored-by: Mathew Wicks <thesuperzapper@users.noreply.github.com>

content/en/_redirects

@@ -185,6 +185,9 @@ docs/started/requirements/                    /docs/started/getting-started/
 /docs/about/kubeflow             /docs/started/introduction
 /docs/started/kubeflow-overview  /docs/started/architecture
 
+# move istio from external-add-ons to multi-tenancy component
+/docs/external-add-ons/istio/*    /docs/components/multi-tenancy/istio
+
 # ===============
 # IMPORTANT NOTE:
 # Catch-all redirects should be added at the end of this file as redirects happen from top to bottom

content/en/docs/external-add-ons/istio/istio-in-kubeflow.md → content/en/docs/components/multi-tenancy/istio.md

@@ -4,10 +4,6 @@ description = "Managing access to Kubeflow applications and resources via Istio"
 weight = 50
 
 +++
-{{% alert title="Out of date" color="warning" %}}
-This guide contains outdated information pertaining to Kubeflow 1.0. This guide
-needs to be updated for Kubeflow 1.1.
-{{% /alert %}}
 
 Kubeflow v0.6 onwards deploys Istio along with configuration to enable
 end-to-end authentication and access control. This setup is the foundation