[v9.3.x] Fix xss in Graphite functions tooltip (#806)

Fix xss in Graphite functions tooltip (#804)

(cherry picked from commit 87aad3f11836f810ee1fdfee27827e746ef36055)

Co-authored-by: Ludovic Viaud <ludovic.viaud@gmail.com>

public/app/plugins/datasource/graphite/components/FunctionEditorControls.tsx

@@ -11,11 +11,9 @@ export interface FunctionEditorControlsProps {
 }
 
 const FunctionDescription = React.lazy(async () => {
-  // @ts-ignore
-  const { default: rst2html } = await import(/* webpackChunkName: "rst2html" */ 'rst2html');
   return {
     default(props: { description?: string }) {
-      return <div dangerouslySetInnerHTML={{ __html: rst2html(props.description ?? '') }} />;
+      return <div>{props.description}</div>;
     },
   };
 });