[DOCS] Relocate request body param docs to search API docs (#56436)

Moves documentation for the following request body parameters to the
search API reference docs:

* `explain`
* `query`
* `seq_no_primary_term`
* `version`

Removes documentation for these parameters from the Request body search
page[0].

[0]: https://www.elastic.co/guide/en/elasticsearch/reference/master/search-request-body.html

docs/reference/search/request-body.asciidoc

@@ -104,8 +104,6 @@ results.
 
 include::request/docvalue-fields.asciidoc[]
 
-include::request/explain.asciidoc[]
-
 include::request/collapse.asciidoc[]
 
 include::request/from-size.asciidoc[]
@@ -124,8 +122,6 @@ include::request/post-filter.asciidoc[]
 
 include::request/preference.asciidoc[]
 
-include::request/query.asciidoc[]
-
 include::request/rescore.asciidoc[]
 
 include::request/script-fields.asciidoc[]
@@ -136,8 +132,6 @@ include::request/search-after.asciidoc[]
 
 include::request/search-type.asciidoc[]
 
-include::request/seq-no.asciidoc[]
-
 include::request/sort.asciidoc[]
 
 include::request/source-filtering.asciidoc[]
@@ -145,5 +139,3 @@ include::request/source-filtering.asciidoc[]
 include::request/stored-fields.asciidoc[]
 
 include::request/track-total-hits.asciidoc[]
-
-include::request/version.asciidoc[]

docs/reference/search/request/explain.asciidoc

@@ -1,15 +0,0 @@
-[[request-body-search-explain]]
-==== Explain
-
-Enables explanation for each hit on how its score was computed.
-
-[source,console]
---------------------------------------------------
-GET /_search
-{
-    "explain": true,
-    "query" : {
-        "term" : { "user" : "kimchy" }
-    }
-}
---------------------------------------------------

docs/reference/search/request/query.asciidoc

@@ -1,15 +0,0 @@
-[[request-body-search-query]]
-==== Query
-
-The query element within the search request body allows to define a
-query using the <<query-dsl,Query DSL>>.
-
-[source,console]
---------------------------------------------------
-GET /_search
-{
-    "query" : {
-        "term" : { "user" : "kimchy" }
-    }
-}
---------------------------------------------------

docs/reference/search/request/seq-no.asciidoc

@@ -1,16 +0,0 @@
-[[request-body-search-seq-no-primary-term]]
-==== Sequence Numbers and Primary Term
-
-Returns the sequence number and primary term of the last modification to each search hit.
-See <<optimistic-concurrency-control>> for more details.
-
-[source,console]
---------------------------------------------------
-GET /_search
-{
-    "seq_no_primary_term": true,
-    "query" : {
-        "term" : { "user" : "kimchy" }
-    }
-}
---------------------------------------------------

docs/reference/search/request/version.asciidoc

@@ -1,15 +0,0 @@
-[[request-body-search-version]]
-==== Version
-
-Returns a version for each search hit.
-
-[source,console]
---------------------------------------------------
-GET /_search
-{
-    "version": true,
-    "query" : {
-        "term" : { "user" : "kimchy" }
-    }
-}
---------------------------------------------------

docs/reference/search/search.asciidoc

@@ -75,8 +75,16 @@ include::{docdir}/rest-api/common-parms.asciidoc[tag=expand-wildcards]
 Defaults to `open`.
 
 `explain`::
-  (Optional, boolean) If `true`, returns detailed information about score
-  computation as part of a hit. Defaults to `false`.
+(Optional, boolean) If `true`, returns detailed information about score
+computation as part of a hit. Defaults to `false`.
++
+--
+[IMPORTANT]
+====
+You can also specify this value using the `explain` request body parameter. If
+both parameters are specified, only the query parameter is used.
+====
+--
 
 include::{docdir}/rest-api/common-parms.asciidoc[tag=from]
 +
@@ -126,7 +134,7 @@ testing.
 
 [IMPORTANT]
 ====
-The `q` parameter overrides the <<search-api-request-body-query,`query`>>
+The `q` parameter overrides the <<request-body-search-query,`query`>>
 parameter in the request body. If both parameters are specified, documents
 matching the `query` request body parameter are not returned.
 ====
@@ -148,8 +156,17 @@ level settings.
 include::{docdir}/rest-api/common-parms.asciidoc[tag=search_type]
 
 `seq_no_primary_term`::
-  (Optional, boolean) If `true`, returns sequence number and primary term of the
-  last modification of each hit.
++
+--
+(Optional, boolean) If `true`, returns sequence number and primary term of the
+last modification of each hit. See <<optimistic-concurrency-control>>.
+
+[IMPORTANT]
+====
+You can also specify this value using the `seq_no_primary_term` request body
+parameter. If both parameters are specified, only the query parameter is used.
+====
+--
 
 `size`::
 (Optional, integer) Defines the number of hits to return. Defaults to `10`.
@@ -232,13 +249,35 @@ include the total number of hits matching the query.
   by their respective types in the response. Defaults to `true`.
 
 `version`::
-  (Optional, boolean)
-  If `true`, returns document version as part of a hit. Defaults to `false.
++
+--
+(Optional, boolean)
+If `true`, returns document version as part of a hit. Defaults to `false`.
+
+[IMPORTANT]
+====
+You can also specify this value using the `version` request body parameter. If
+both parameters are specified, only the query parameter is used.
+====
+--
 
 
 [[search-search-api-request-body]]
 ==== {api-request-body-title}
 
+[[request-body-search-explain]]
+`explain`::
+(Optional, boolean) If `true`, returns detailed information about score
+computation as part of a hit. Defaults to `false`.
++
+--
+[IMPORTANT]
+====
+You can also specify this value using the `explain` request body parameter. If
+both parameters are specified, only the query parameter is used.
+====
+--
+
 include::{docdir}/rest-api/common-parms.asciidoc[tag=from]
 +
 --
@@ -249,10 +288,24 @@ parameters are specified, only the query parameter is used.
 ====
 --
 
-[[search-api-request-body-query]]
+[[request-body-search-query]]
 `query`::
-  (Optional, <<query-dsl,query object>>) Defines the search definition using the
-  <<query-dsl,Query DSL>>.
+(Optional, <<query-dsl,query object>>) Defines the search definition using the
+<<query-dsl,Query DSL>>.
+
+[[request-body-search-seq-no-primary-term]]
+`seq_no_primary_term`::
++
+--
+(Optional, boolean) If `true`, returns sequence number and primary term of the
+last modification of each hit. See <<optimistic-concurrency-control>>.
+
+[IMPORTANT]
+====
+You can also specify this value using the `seq_no_primary_term` query parameter.
+If both parameters are specified, only the query parameter is used.
+====
+--
 
 `size`:: 
 (Optional, integer) The number of hits to return. Defaults to `10`.
@@ -291,6 +344,21 @@ parameters are specified, only the query parameter is used.
 ====
 --
 
+[[request-body-search-version]]
+`version`::
++
+--
+(Optional, boolean)
+If `true`, returns document version as part of a hit. Defaults to `false`.
+
+[IMPORTANT]
+====
+You can also specify this value using the `version` query parameter. If both
+parameters are specified, only the query parameter is used.
+====
+--
+
+
 [role="child_attributes"]
 [[search-api-response-body]]
 ==== {api-response-body-title}