Reimplement announcements (#21586)

* Reimplement announcements

Signed-off-by: Celeste Horgan <celeste@cncf.io>

Address deprecation-warning styling

Signed-off-by: Celeste Horgan <celeste@cncf.io>

Use partial only

Signed-off-by: Celeste Horgan <celeste@cncf.io>

Refine

Signed-off-by: Celeste Horgan <celeste@cncf.io>

* Turn on announcements for preview only

Signed-off-by: Celeste Horgan <celeste@cncf.io>

* Update config.toml

Co-authored-by: Celeste Horgan <celeste@cncf.io>

Co-authored-by: Zach Corleissen <zacharysarah@users.noreply.github.com>

layouts/partials/deprecation-warning.html

@@ -1,13 +1,14 @@
-{{ if .Param "deprecated" }}
+{{ if .Site.Param "deprecated" }}
 <section id="deprecationWarning">
   <main>
     <div class="content deprecation-warning">
       <h3>
-	 Kubernetes {{ .Param "version" }}
-	 {{ T "deprecation_warning" }}
-	 <a href="{{ site.Params.currentUrl }}">{{ T "latest_version" }}</a>
+        {{ T "deprecation_title" }} {{ .Param "version" }}
       </h3>
+      <p> Kubernetes {{ .Param "version" }} {{ T "deprecation_warning" }}
+        <a href="{{ site.Params.currentUrl }}">{{ T "latest_version" }}</a>
+      </p>
     </div>
   </main>
 </section>
-{{ end }}
+{{ end }}