Move CrossProjectRoutingResolver to Serverless (#138444)

Author: smalyshev

server/src/main/java/org/elasticsearch/node/NodeConstruction.java

@@ -209,7 +209,6 @@
 import org.elasticsearch.search.SearchService;
 import org.elasticsearch.search.SearchUtils;
 import org.elasticsearch.search.aggregations.support.AggregationUsageService;
-import org.elasticsearch.search.crossproject.CrossProjectRoutingResolver;
 import org.elasticsearch.search.crossproject.ProjectRoutingResolver;
 import org.elasticsearch.shutdown.PluginShutdownService;
 import org.elasticsearch.snapshots.CachingSnapshotAndShardByStateMetricsService;
@@ -1015,7 +1014,7 @@ public Map<String, String> queryFields() {
 
         final var projectRoutingResolver = pluginsService.loadSingletonServiceProvider(
             ProjectRoutingResolver.class,
-            CrossProjectRoutingResolver::new
+            () -> ProjectRoutingResolver.NOOP
         );
 
         PluginServiceInstances pluginServices = new PluginServiceInstances(

server/src/main/java/org/elasticsearch/search/crossproject/CrossProjectRoutingResolver.java

@@ -26,4 +26,7 @@ public interface ProjectRoutingResolver {
      * @return A new TargetProjects instance containing only the projects that match the project routing.
      */
     TargetProjects resolve(String projectRouting, TargetProjects targetProjects);
+
+    /** No-op router - just returns the provided target projects. */
+    ProjectRoutingResolver NOOP = (projectRouting, targetProjects) -> targetProjects;
 }