[Backport 8.15] Added/updated snippets for docs (#2319)

(cherry picked from commit f737290d10)

Co-authored-by: Josh Mock <joshua.mock@elastic.co>

docs/doc_examples/a56c20a733a350673d41829c8daaafbe.asciidoc

@@ -0,0 +1,21 @@
+// This file is autogenerated, DO NOT EDIT
+// Use `node scripts/generate-docs-examples.js` to generate the docs examples
+
+[source, js]
+----
+const response = await client.autoscaling.putAutoscalingPolicy({
+  name: "my_autoscaling_policy",
+  policy: {
+    roles: ["data_hot"],
+    deciders: {
+      fixed: {
+        storage: "1tb",
+        memory: "32gb",
+        processors: 2.3,
+        nodes: 8,
+      },
+    },
+  },
+});
+console.log(response);
+----