Parquet Writer: Support writing all types (test_all_types), and write column statistics

[Mytherin]

Fixes #2664

This PR expands the Parquet writer to support writing all types, and to support writing min/max/null_count statistics for most common types (numerics, dates/timestamps, strings, enums, etc). We also implement some extra functionality in the reader and fix a few more bugs. All in all, the following changes are made:

• Correctly set max_string_length to the maximum possible value in Parquet statistics propagation
• Add support for reading decimals stored as BYTE_ARRAY (instead of only FIXED_LEN_BYTE_ARRAY)
• Write decimals as decimals (either INT32, INT64 or FIXED_LEN_BYTE_ARRAY depending on width), instead of converting to double
• Add support for reading/writing UUID and Intervals using their respective logical/converted types
• Add support for writing enums to a string column with a dictionary page
• Gather statistics during writing for boolean, numeric, date/time/timestamps, string and enum columns
• Write DATE_TZ/TIME_TZ/TIMESTAMP_TZ by converting to regular timestamps

This PR allows us to (more-or-less) round-trip the test_all_types column, with some minor caveats (e.g. hugeints are converted to doubles, TZ types lose their TZ specifier).