DOC-13120: Convert Search REST APIs to OpenAPI (#3807)

* Move FTS REST pages to cb-swagger
* Move FTS REST examples to cb-swagger
* Update links to Search REST APIs
* Remove legacy REST APIs from partial
* Update Search REST API partial
* Deep links
* Reorder partial to match navigation
* Add cb-swagger to the preview build
* Driveby: remove old capella branch from preview config
* Move nsstats for index into the Stats spec
* Minor link changes

Author: simon-dew

modules/ROOT/nav.adoc

@@ -510,12 +510,12 @@ include::cli:partial$cbcli/nav.adoc[]
      *** xref:rest-api:backup-node-threads.adoc[]
 
    ** xref:rest-api:rest-fts.adoc[Search Service API]
-    *** xref:rest-api:rest-fts-node.adoc[Node Configuration]
-    *** xref:rest-api:rest-fts-indexing.adoc[Indexes]
-    *** xref:rest-api:rest-fts-advanced.adoc[Advanced]
-    *** xref:rest-api:rest-fts-statistics.adoc[Search Statistics]
-    *** xref:rest-api:rest-fts-query.adoc[Active Queries]
-    *** xref:rest-api:rest-fts-partition-file-transfer.adoc[Rebalance Based on File Transfer]
+    *** xref:fts-rest-nodes:index.adoc[Node Configuration]
+    *** xref:fts-rest-indexing:index.adoc[Indexes]
+    *** xref:fts-rest-advanced:index.adoc[Advanced]
+    *** xref:fts-rest-stats:index.adoc[Search Statistics]
+    *** xref:fts-rest-query:index.adoc[Active Queries]
+    *** xref:fts-rest-manage:index.adoc[Search Manager Options]
 
    ** xref:eventing-rest-api:index.adoc[Eventing Service API]
 

modules/learn/pages/clusters-and-availability/rebalance.adoc

@@ -243,7 +243,7 @@ Community Edition clusters that are upgraded to Enterprise Edition 7.0.2 can hav
 During file transfer, should an unresolvable error occur, file transfer is automatically abandoned, and _partition build_ is used instead.
 
 The file-transfer feature can be enabled and disabled by means of the REST API.
-See xref:rest-api:rest-fts-partition-file-transfer.adoc[Rebalance Based on File Transfer].
+See xref:fts-rest-manage:index.adoc[Search Manager Options].
 
 [#rebalancing-the-query-service]
 === Query Service