DEV: Remove buffered rendering from i18n count

This is another refactoring in the multi-step process to remove all uses
of our custom Render Buffer.

Previous commit: 80f4b9e2279856eb34349636a50a3cc3967ffaf3 in this
series.

This commit affects the display of translated counts that is used in
multiple places like showing how many posts are selected using the
select posts feature on a topic. It is just a refactor and does not
change any functionality.

app/assets/javascripts/discourse/components/count-i18n.js.es6

@@ -1,17 +1,15 @@
 import Component from "@ember/component";
-import { bufferedRender } from "discourse-common/lib/buffered-render";
 
-export default Component.extend(
-  bufferedRender({
+export default Component.extend({
   tagName: "span",
   rerenderTriggers: ["count", "suffix"],
+  i18nCount: null,
 
-    buildBuffer(buffer) {
-      buffer.push(
-        I18n.t(this.key + (this.suffix || ""), {
-          count: this.count
-        })
+  didReceiveAttrs() {
+    this._super(...arguments);
+    this.set(
+      "i18nCount",
+      I18n.t(this.key + (this.suffix || ""), { count: this.count }).htmlSafe()
     );
   }
-  })
-);
+});

app/assets/javascripts/discourse/templates/components/count-i18n.hbs

@@ -0,0 +1 @@
+{{i18nCount}}