[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/a7fb1c0d0827d66bfa66016f2564b10c.asciidoc

@@ -0,0 +1,12 @@
+// 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.eql.search({
+  index: "my-data-stream",
+  query:
+    '\n    process where process.name == "regsvr32.exe" and process.command_line.keyword != null\n  ',
+});
+console.log(response);
+----