Add scripts for retrieving the cluster file encryption key

Bruce Momjian <bruce@momjian.us>

Commit: d7602afa2ef6d8b2018103dccd89e75b4985ac06
Author: Bruce Momjian <bruce@momjian.us>
Date: 2020-12-26T06:19:09Z
Releases: 14.0
Add scripts for retrieving the cluster file encryption key

Scripts are passphrase, direct, AWS, and two Yubikey ones.

Backpatch-through: master

Files