Missing Logical type for INTERVAL

[senekis]

As converted types are deprecated and we should use Logical types, but currently there is missing the Logical Type for Interval in the library

[akrennmair]

Unfortunately, the parquet file format definition (https://github.com/apache/parquet-format/blob/master/src/main/thrift/parquet.thrift) only contains a definition of INTERVAL for converted types but not for logical types. It contains a comment about a numeric logical type identifier being reserved for it, but INTERVAL is simply not available as logical type, for whatever reason.