arrow

GH-36008: [Ruby][Parquet] Add Parquet::ArrowFileReader#each_row_group (#36022)

### Rationale for this change
This change allows you to read a large Parquet file per row group.
- ref: https://github.com/apache/arrow/issues/36001

### What changes are included in this PR?
- Add Parquet::ArrowFileReader#each_row_group
- Add the related test about it

### Are these changes tested?
Yes
- I don't have confidence about the test. Could you give me a comment?

### Are there any user-facing changes?
No

Close: https://github.com/apache/arrow/issues/36008
* Closes: #36008

Authored-by: otegami <a.s.takuya1026@gmail.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>