Add parquet-sampling configuration options

[rjzamora]

Description

Closes #19389

Adds max_footer_samples and max_row_group_samples configuration options to control metadata/row-group sampling. Although these configuration options are only used by the streaming executor, it felt more natural to add these to ParquetOptions (since they are definitely Parquet specific).

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[TomAugspurger]

Thanks. Could you also add update test_config_option_from_env in test_config.py to test out setting these via environment variables?

[rjzamora]

Could you also add update test_config_option_from_env in test_config.py to test out setting these via environment variables?

Good point - I updated test_parquet_options_from_env (since these are ParquetOptions).

[rjzamora]

/merge

[rapids-bot]

Failed to merge PR using squash strategy.