[DOCS] Add JS client helper links to docs (#55216) (#56968)

Adds links for the Elasticsearch-js client to the bulk and scroll docs.

Co-authored-by: Tomas Della Vedova <delvedor@users.noreply.github.com>

docs/reference/docs/bulk.asciidoc

@@ -105,6 +105,10 @@ Python::
 
     See http://elasticsearch-py.readthedocs.org/en/master/helpers.html[elasticsearch.helpers.*]
 
+JavaScript::
+
+    See {jsclient-current}/client-helpers.html[client.helpers.*]
+
 [float]
 [[bulk-curl]]
 ===== Submitting bulk requests with cURL

docs/reference/search/request/scroll.asciidoc

@@ -25,6 +25,10 @@ Python::
 
     See http://elasticsearch-py.readthedocs.org/en/master/helpers.html[elasticsearch.helpers.*]
 
+JavaScript::
+
+    See {jsclient-current}/client-helpers.html[client.helpers.*]
+
 *********************************************
 
 NOTE: The results that are returned from a scroll request reflect the state of