A11Y: discourse-tags should have a role and label (#19977)

app/assets/javascripts/discourse/app/lib/render-tags.js

@@ -1,3 +1,4 @@
+import I18n from "I18n";
 import renderTag from "discourse/lib/render-tag";
 
 let callbacks = null;
@@ -56,7 +57,8 @@ export default function (topic, params) {
   }
 
   if (customHtml || (tags && tags.length > 0)) {
-    buffer = "<div class='discourse-tags'>";
+    buffer = `<div class='discourse-tags' role='list' 
+                aria-label=${I18n.t("tagging.tags")}>`;
     if (tags) {
       for (let i = 0; i < tags.length; i++) {
         buffer +=