Save Cloud SQL connection names in Keyring (#2622)

This eliminates the need to make a new release after database disaster
recovery.

core/src/test/java/google/registry/keyring/secretmanager/SecretManagerKeyringUpdaterTest.java

@@ -102,6 +102,24 @@ public class SecretManagerKeyringUpdaterTest {
     verifyPersistedSecret("bsa-api-key-string", secret);
   }
 
+  @Test
+  void sqlPrimaryConnectionName() {
+    String name = "name";
+    updater.setSqlPrimaryConnectionName(name).update();
+
+    assertThat(keyring.getSqlPrimaryConnectionName()).isEqualTo(name);
+    verifyPersistedSecret("sql-primary-conn-name", name);
+  }
+
+  @Test
+  void sqlReplicaConnectionName() {
+    String name = "name";
+    updater.setSqlReplicaConnectionName(name).update();
+
+    assertThat(keyring.getSqlReplicaConnectionName()).isEqualTo(name);
+    verifyPersistedSecret("sql-replica-conn-name", name);
+  }
+
   @Test
   void marksdbDnlLoginAndPassword() {
     String secret = "marksdbDnlLoginAndPassword";

core/src/test/java/google/registry/testing/FakeKeyringModule.java

@@ -56,6 +56,8 @@ public final class FakeKeyringModule {
   private static final String MARKSDB_LORDN_PASSWORD = "yolo";
   private static final String MARKSDB_SMDRL_LOGIN_AND_PASSWORD = "smdrl:yolo";
   private static final String BSA_API_KEY = "bsaapikey";
+  private static final String SQL_PRIMARY_CONNECTION = "project:primary-region:primary-name";
+  private static final String SQL_REPLICA_CONNECTION = "project:replica-region:replica-name";
 
   @Provides
   public Keyring get() {
@@ -151,6 +153,16 @@ public final class FakeKeyringModule {
         return rdeReceiverKey;
       }
 
+      @Override
+      public String getSqlPrimaryConnectionName() {
+        return SQL_PRIMARY_CONNECTION;
+      }
+
+      @Override
+      public String getSqlReplicaConnectionName() {
+        return SQL_REPLICA_CONNECTION;
+      }
+
       @Override
       public void close() {}
     };