add logical type timestamp with timezone (per SQL)

timestamp with timezone (per SQL)
timestamps are adjusted to UTC and stored as integers.
metadata in logical types PR:
See discussion here: https://github.com/apache/parquet-format/pull/51#discussion_r109667837

**Reporter**: [Julien Le Dem](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=julienledem) / @julienledem
**Assignee**: [Julien Le Dem](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=julienledem) / @julienledem
#### Related issues:
- [Release Parquet format 2.4.0](https://github.com/apache/parquet-format/issues/274) (depends upon)
- [Update parquet.thrift from https://github.com/apache/parquet-format](https://github.com/apache/arrow/issues/42523) (is depended upon by)
#### PRs and other links:
- [PR #51: Add new LogicalType structures to the format](https://github.com/apache/parquet-format/pull/51)

_{**Note**: *This issue was originally created as [PARQUET-906](https://issues.apache.org/jira/browse/PARQUET-906). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Start by reading the logical types discussion in PR #51 and the linked SQL timestamp semantics. Check how the format metadata represents timestamps adjusted to UTC and stored as integers; done means the new timestamp-with-timezone logical type is defined consistently with that behavior.

Written by the indexing model from the issue text.