Existing index infoes in ColumnFileTiny are missed after add new indexes.

[Lloyd-Pottiger]

Bug Report

tiflash/dbms/src/Storages/DeltaMerge/ColumnFile/ColumnFileTinyLocalIndexWriter.cpp

Lines 232 to 233 in 67438e8

	if (file->index_infos)
	file->index_infos->insert(file->index_infos->end(), index_infos->begin(), index_infos->end());

It should be:

if (const auto & file_index_info = file->getIndexInfos(); file_index_info)
        index_infos->insert(index_infos->end(), file_index_info->begin(), file_index_info->end());