Use remote caches in RDAP queries (#3034)

Note that this primarily affects domain lookups. We choose to use the
remote cache for hosts based on repo ID (not host name), so the remote
caches are not particularly useful for host lookups. We chose this
because the number of domain queries is orders of magnitude higher than
the number of host queries.

core/src/test/java/google/registry/rdap/RdapActionBaseTestCase.java

@@ -28,8 +28,10 @@ import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
+import google.registry.model.ForeignKeyUtils;
 import google.registry.model.console.User;
 import google.registry.model.console.UserRoles;
+import google.registry.model.domain.Domain;
 import google.registry.persistence.transaction.JpaTestExtensions;
 import google.registry.persistence.transaction.JpaTestExtensions.JpaIntegrationTestExtension;
 import google.registry.request.Actions;
@@ -92,6 +94,8 @@ abstract class RdapActionBaseTestCase<A extends RdapActionBase> {
     action.rdapJsonFormatter = RdapTestHelper.getTestRdapJsonFormatter(clock);
     action.rdapMetrics = rdapMetrics;
     action.requestMethod = GET;
+    action.domainCache =
+        (domainName) -> ForeignKeyUtils.loadResourceByCache(Domain.class, domainName, clock.now());
     action.clock = new FakeClock(DateTime.parse("2025-01-01T00:00:00.000Z"));
     logout();
   }

core/src/test/java/google/registry/rdap/RdapTestHelper.java

@@ -27,8 +27,12 @@ import com.google.gson.GsonBuilder;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import google.registry.model.EppResource;
+import google.registry.model.host.Host;
+import google.registry.persistence.VKey;
 import google.registry.util.Clock;
 import java.util.Map;
+import java.util.Optional;
 
 /** Test helper methods for RDAP tests. */
 class RdapTestHelper {
@@ -68,6 +72,8 @@ class RdapTestHelper {
                 + " suspect that you have failed to comply with these terms.",
             "We reserve the right to modify this agreement at any time.");
     rdapJsonFormatter.rdapTosStaticUrl = "https://www.example.tld/about/rdap/tos.html";
+    rdapJsonFormatter.hostCache =
+        (repoId) -> Optional.ofNullable(EppResource.loadByCache(VKey.create(Host.class, repoId)));
     return rdapJsonFormatter;
   }