Added/updated snippets for docs (#2318)

docs/doc_examples/56563f91d9f0b74e9e4aae9cb221845b.asciidoc

@@ -0,0 +1,35 @@
+// 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.transport.request({
+  method: "POST",
+  path: "/_security/cross_cluster/api_key",
+  body: {
+    name: "my-cross-cluster-api-key",
+    expiration: "1d",
+    access: {
+      search: [
+        {
+          names: ["logs*"],
+        },
+      ],
+      replication: [
+        {
+          names: ["archive*"],
+        },
+      ],
+    },
+    metadata: {
+      description: "phase one",
+      environment: {
+        level: 1,
+        trusted: true,
+        tags: ["dev", "staging"],
+      },
+    },
+  },
+});
+console.log(response);
+----