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ARROW-10227: [Ruby] Use a table size as the default for parquet chunk_size

A chunk_size that is too small will cause metadata bloat in the parquet file, leading to poor read performance. Set the chunk_size to be the same value as the table size so that one file becomes one row_group.

Closes #8391 from kanga333/ruby-use-table-size-for-chunk-size

Authored-by: kanga333 <e411z7t40w@gmail.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>