Parquet: Support definition-driven partition parsing for key=value directory-based partitioning

[rcaudy]

Closes #4258

To use:

    public static Table readDefinedKeyValuePartitionedTable(
            @NotNull final File directory,
            @NotNull final ParquetInstructions readInstructions,
            @NotNull final TableDefinition tableDefinition) {
        return TableTools.readPartitionedTable(
                new ParquetKeyValuePartitionedLayout(directory, tableDefinition),
                readInstructions,
                tableDefinition);
    }

[deephaven-internal]

Labels indicate documentation is required. Issues for documentation have been opened:

How-to: https://github.com/deephaven/deephaven.io/issues/3004
Reference: https://github.com/deephaven/deephaven.io/issues/3005