[DOCS ]Direct users to new API reference site (#195909)

## Summary

Contributes to
https://github.com/elastic/security-docs-internal/issues/48.

Add callouts to the asciidoc Osquery API docs to direct users to the new
API reference site, in preparation for retiring the asciidoc API docs.

NOTE: The api-kibana variable is defined in version-specific files. In
[8.15.asciidoc](873ec2c47f/shared/versions/stack/8.15.asciidoc (L74))
and
[8.x.asciidoc](873ec2c47f/shared/versions/stack/8.x.asciidoc (L75)),
the variable points to the [v8
branch](https://www.elastic.co/docs/api/doc/kibana/v8) of the API
reference, which currently doesn't include Security API docs. The v8
branch is derived from the "current" Kibana branch, which is currently
8.15. This likely means that we can only backport the callouts to 8.16
once 8.16 becomes the "current" docs version.

Preview: [Osquery manager
API](https://kibana_bk_195909.docs-preview.app.elstc.co/guide/en/kibana/master/osquery-manager-api.html)
and all its child pages

docs/api/osquery-manager.asciidoc

@@ -1,6 +1,12 @@
 [[osquery-manager-api]]
 == Osquery manager API
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Run live queries, manage packs and saved queries
 
 Use the osquery manager APIs for managing packs and saved queries.

docs/api/osquery-manager/live-queries/create.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Create live query</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Create live queries.
 
 

docs/api/osquery-manager/live-queries/get-all.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Get live queries</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Get live queries.
 
 

docs/api/osquery-manager/live-queries/get-results.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Get live query results</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Retrieve a single live query result by ID.
 
 

docs/api/osquery-manager/live-queries/get.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Get live query</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Retrieves a single live query by ID.
 
 

docs/api/osquery-manager/packs/create.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Create pack</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Create packs.
 
 

docs/api/osquery-manager/packs/delete.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Delete pack</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Delete packs.
 
 WARNING: Once you delete a pack, _it cannot be recovered_.

docs/api/osquery-manager/packs/get-all.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Get packs</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Get packs.
 
 

docs/api/osquery-manager/packs/get.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Get pack</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Retrieve a single pack by ID.
 
 

docs/api/osquery-manager/packs/update.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Update pack</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Update packs.
 
 WARNING: You are unable to update a prebuilt pack (`read_only = true`).

docs/api/osquery-manager/saved-queries/create.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Create saved query</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Create saved queries.
 
 

docs/api/osquery-manager/saved-queries/delete.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Delete saved query</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Delete saved queries.
 
 WARNING: Once you delete a saved query, _it cannot be recovered_.

docs/api/osquery-manager/saved-queries/get-all.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Get saved-queries</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Get saved queries.
 
 

docs/api/osquery-manager/saved-queries/get.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Get saved query</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Retrieve a single saved query by ID.
 
 

docs/api/osquery-manager/saved-queries/update.asciidoc

@@ -4,6 +4,12 @@
 <titleabbrev>Update saved query</titleabbrev>
 ++++
 
+.New API Reference
+[sidebar]
+--
+For the most up-to-date API details, refer to {api-kibana}/group/endpoint-security-osquery-api[Osquery APIs].
+--
+
 experimental[] Update saved queries.
 
 WARNING: You are unable to update a prebuilt saved query (`prebuilt = true`).