Something the upstream system(eg, hive) may create empty orc file
which only has a header and footer, without schema.
And if we call `_reader->createRowReader()` with selected columns,
it will throw ParserError: Invalid column selected xx.
So here we first check its number of rows and skip these kind of files.
This is only a fix for non-vec load, for vec load, it use arrow scanner
to read orc file, which does not have this problem.
