[TEST] Re-add sparse dataset row ID and ignore attributes

[sajeed69]

Description

Re-adds coverage for row ID and ignored attributes in the sparse dataset test.

Changes

• Enable include_row_id=True and include_ignore_attribute=True.
• Verify that the row ID (V512) and ignored attribute (V256) are returned.
• Verify sparse dtypes and expected output shapes.
• Verify attribute_names and categorical metadata.

Testing

• Targeted sparse dataset test: 1 passed
• Full tests/test_datasets/test_dataset.py: 22 passed, 4 skipped
• git diff --check: passed

Closes #1644