Deep verification of encrypted files

A tools that verifies encryption of parquet files in a given folder. Analyzes the footer, and then every module (page headers, pages, column indexes, bloom filters) - making sure they are encrypted (in relevant columns). Potentially checking the encryption keys.

We'll start with a design doc, open for discussion.

**Reporter**: [Gidon Gershinsky](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=gershinsky) / @ggershinsky
**Assignee**: [Maya Anderson](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=mayaa) / @andersonm-ibm
#### PRs and other links:
- [Design doc](https://docs.google.com/document/d/1c6Vc2X2CPTReWG3aHoBhOBUJ7ghk80wTzcqs04bBDX8/edit?usp=sharing)

_{**Note**: *This issue was originally created as [PARQUET-1989](https://issues.apache.org/jira/browse/PARQUET-1989). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}