Add exclude_unreviewed param to GET /api/v2/search REST API (#11977)

Make it so normal search returns even unreviewed matches, but
autosuggestions do not.

Fix #11960

app/services/search_service.rb

@@ -60,7 +60,8 @@ class SearchService < BaseService
     TagSearchService.new.call(
       @query,
       limit: @limit,
-      offset: @offset
+      offset: @offset,
+      exclude_unreviewed: @options[:exclude_unreviewed]
     )
   end
 

app/services/tag_search_service.rb

@@ -2,11 +2,12 @@
 
 class TagSearchService < BaseService
   def call(query, options = {})
-    @query  = query.strip.gsub(/\A#/, '')
-    @offset = options[:offset].to_i
-    @limit  = options[:limit].to_i
+    @query   = query.strip.gsub(/\A#/, '')
+    @offset  = options.delete(:offset).to_i
+    @limit   = options.delete(:limit).to_i
+    @options = options
 
-    results = from_elasticsearch if Chewy.enabled?
+    results   = from_elasticsearch if Chewy.enabled?
     results ||= from_database
 
     results
@@ -72,12 +73,15 @@ class TagSearchService < BaseService
       },
     }
 
-    TagsIndex.query(query).filter(filter).limit(@limit).offset(@offset).objects.compact
+    definition = TagsIndex.query(query)
+    definition = definition.filter(filter) if @options[:exclude_unreviewed]
+
+    definition.limit(@limit).offset(@offset).objects.compact
   rescue Faraday::ConnectionFailed, Parslet::ParseFailed
     nil
   end
 
   def from_database
-    Tag.search_for(@query, @limit, @offset)
+    Tag.search_for(@query, @limit, @offset, @options)
   end
 end