Add domain repo ID and token type indexes to AllocationToken table (#1560)

These are useful for the purposes of filtering by one-time/multi-use tokens, and
for determining which one-time tokens have been used (and if so, for which
domain).

core/src/main/java/google/registry/model/domain/token/AllocationToken.java

@@ -76,6 +76,8 @@ import org.joda.time.DateTime;
       @javax.persistence.Index(
           columnList = "domainName",
           name = "allocation_token_domain_name_idx"),
+      @javax.persistence.Index(columnList = "tokenType"),
+      @javax.persistence.Index(columnList = "redemption_domain_repo_id")
     })
 public class AllocationToken extends BackupGroupRoot implements Buildable, DatastoreAndSqlEntity {