Implement caching_sha2_password Hashing

[daylicron]

Use Case

I want to be able to use the Puppet MySQL module with future MySQL 8 versions. The MySQL Server warns me in his logs, that mysql_native_password will be removed in the future

[Warning] [MY-013360] [Server] Plugin mysql_native_password reported: ''mysql_native_password' is deprecated and will be removed in a future release. Please use caching_sha2_password instead'

Describe the Solution You Would Like

Implementing a feature that can create MySQL users using caching_sha2_password.

Additional Context

This one seems difficult as I couldn't find a documented way that MySQL uses to hash passwords with caching_sha2_password, so that Puppet can hash the password the same way. The MySQL password function has been removed, too. I was thinking about using
IDENTIFIED WITH caching_sha2_password BY '#{string}'"
but I guess this way Puppet would recreate the user every run.

Does anybody has already started on this or has any idea?

[C24-AK]

Hey I started a PR #1612 for this topic and found a way to implement it. Maybe someone with more knowledge can improve it.