[DOC-12432] Document Usage of {"ctl": { "validate" : true }, } for Search Queries (#302)

* [DOC-12432] Clarifying search_after and search_before behaviour, along with sorting and general pagination tips.

Adding documentation on the new validate object - in search-request-params and as examples in the simple-search topics.

Adding query results to the example in the REST API topic, and expanding on what those results mean.

Fixing error in field path in the example full-request.

* Add 7.6.4 version labels for validate property

---------

Co-authored-by: Sarah Welton <[email protected]>

Author: simon-dew

modules/search/pages/search-request-params.adoc

@@ -1967,9 +1967,6 @@ include::example$run-search-full-request.jsonc[tag=ctl]
 
 In Couchbase Server 7.6.4 and later, you can also use the `ctl` object with the `validate` property to add an extra check to your queries and get help troubleshooting when a query does not return results. 
 
-The `ctl` object can contain the following properties:
-In Couchbase Server 7.6.4 and later, you can also use the `ctl` object with the `validate` property to add an extra check to your queries and get help troubleshooting when a query does not return results. 
-
 The `ctl` object can contain the following properties:
 
 [cols="1,1,1,4"]
@@ -2001,18 +1998,6 @@ For example, the Search Service can tell you through the Web Console or the REST
 err: query_validate: field not indexed, field: ratings.Cleanliness, type: number
 ----
 
-|[[validate]]validate |Boolean |No a|
-
-[.status]#Couchbase Server 7.6.4#
-
-Add the `validate` property with a value of `true` to add extra validation checks to your Search query.
-
-For example, the Search Service can tell you through the Web Console or the REST API that a field in your Search query is not in your Search index: 
-
-----
-err: query_validate: field not indexed, field: ratings.Cleanliness, type: number
-----
-
 |====
 
 [#consistency]