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GH-33749: [Ruby] Add Arrow::RecordBatch#each_raw_record (#37137)



### Rationale for this change

This change allows for efficient iteration over large datasets, particularly those utilizing the Apache Parquet format.

### What changes are included in this PR?

- Add the following methods to make the raw_records method iterable.
  - Arrow::RecordBatch#each_raw_record
  - Arrow::Table#each_raw_record
- Add related test

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.

This PR is related to  #33749
* Closes: #33749

Lead-authored-by: otegami <a.s.takuya1026@gmail.com>
Co-authored-by: takuya kodama <a.s.takuya1026@gmail.com>
Co-authored-by: Sutou Kouhei <kou@cozmixng.org>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>