message: fix delete index
diff: @@ -296,7 +296,8 @@ Status MetaVersionMan::doUpgrade(kvstore::KVStore* kv) {
  // delete
  {
  - std::vector<std::string> prefixes({nebula::oldmeta::kIndexesTable,
  + std::vector<std::string> prefixes({nebula::oldmeta::kIndexStatusTable,
  + nebula::oldmeta::kIndexesTable,
  nebula::oldmeta::kDefaultTable,
  nebula::oldmeta::kCurrJob,
  nebula::oldmeta::kJobArchive});
  @@ -306,9 +307,19 @@ Status MetaVersionMan::doUpgrade(kvstore::KVStore* kv) {
  if (ret == kvstore::ResultCode::SUCCEEDED) {
  Status status = Status::OK();
  while (iter->valid()) {
  + if (prefix == nebula::oldmeta::kIndexesTable) {
  if (FLAGS_print_info) {
  upgrader.printIndexes(iter->val());
  }
  + auto oldItem = oldmeta::MetaServiceUtilsV1::parseIndex(iter->val());
  + auto spaceId = MetaServiceUtils::parseIndexesKeySpaceID(iter->key());
  + status = upgrader.deleteKeyVal(
  + MetaServiceUtils::indexIndexKey(spaceId, oldItem.get_index_name()));
  + if (!status.ok()) {
  + LOG(ERROR) << status;
  + return status;
  + }
  + }
  status = upgrader.deleteKeyVal(iter->key());
  if (!status.ok()) {
  LOG(ERROR) << status;
  