[DOCS] Add index-all.asciidoc for build purposes (#25186)

Author: lcawl

docs/reference/index-all.asciidoc

@@ -0,0 +1,4 @@
+[[elasticsearch-reference]]
+= Elasticsearch Reference
+
+include::index-shared.asciidoc[]

docs/reference/index-shared.asciidoc

@@ -0,0 +1,48 @@
+
+:version:       2.3.4
+:branch:        2.3
+:major-version: 2.x
+:jdk:           1.8.0_73
+:defguide:      https://www.elastic.co/guide/en/elasticsearch/guide/2.x
+:plugins:       https://www.elastic.co/guide/en/elasticsearch/plugins/2.3
+:javaclient:    https://www.elastic.co/guide/en/elasticsearch/client/java-api/2.3/
+:issue:         https://github.com/elastic/elasticsearch/issues/
+:pull:          https://github.com/elastic/elasticsearch/pull/
+
+include::getting-started.asciidoc[]
+
+include::setup.asciidoc[]
+
+include::migration/index.asciidoc[]
+
+include::api-conventions.asciidoc[]
+
+include::docs.asciidoc[]
+
+include::search.asciidoc[]
+
+include::aggregations.asciidoc[]
+
+include::indices.asciidoc[]
+
+include::cat.asciidoc[]
+
+include::cluster.asciidoc[]
+
+include::query-dsl.asciidoc[]
+
+include::mapping.asciidoc[]
+
+include::analysis.asciidoc[]
+
+include::modules.asciidoc[]
+
+include::index-modules.asciidoc[]
+
+include::testing.asciidoc[]
+
+include::glossary.asciidoc[]
+
+include::release-notes.asciidoc[]
+
+include::redirects.asciidoc[]

docs/reference/index.asciidoc

@@ -1,54 +1,5 @@
 [[elasticsearch-reference]]
 = Elasticsearch Reference
 
-:version:       2.3.4
-:branch:        2.3
-:major-version: 2.x
-:jdk:           1.8.0_73
-:defguide:      https://www.elastic.co/guide/en/elasticsearch/guide/2.x
-:plugins:       https://www.elastic.co/guide/en/elasticsearch/plugins/2.3
-:javaclient:    https://www.elastic.co/guide/en/elasticsearch/client/java-api/2.3/
-:issue:         https://github.com/elastic/elasticsearch/issues/
-:pull:          https://github.com/elastic/elasticsearch/pull/
-
-include::getting-started.asciidoc[]
-
-include::setup.asciidoc[]
-
-include::migration/index.asciidoc[]
-
-include::api-conventions.asciidoc[]
-
-include::docs.asciidoc[]
-
-include::search.asciidoc[]
-
-include::aggregations.asciidoc[]
-
-include::indices.asciidoc[]
-
-include::cat.asciidoc[]
-
-include::cluster.asciidoc[]
-
-include::query-dsl.asciidoc[]
-
-include::mapping.asciidoc[]
-
-include::analysis.asciidoc[]
-
-include::modules.asciidoc[]
-
-include::index-modules.asciidoc[]
-
-include::testing.asciidoc[]
-
-include::glossary.asciidoc[]
-
-include::release-notes.asciidoc[]
-
-include::redirects.asciidoc[]
-
-
-
 
+include::index-shared.asciidoc[]