Fixes #25479: Users cleanup configuration is too strict on disabled users

[clarktsiory]

https://issues.rudder.io/issues/25479

• Add an appropriate log with the application.authentication name and use it in the CleanupUsers file
• Improve logs globally : add some missing logs (for disable/purged) and use zio.Duration#render to display the date
• Only apply deletion of inactive only on disabled users

As for the properties file :

• Allow to parse "never" as zio.Duration.Infinity, when used in the config the existing logic of the code is still valid (eventually the code is disabling/deletion is never run)
• Improve the comments and update default to 90 days for disableAfterLastLogin

[fanf]

Lgtm.
in an other pr, we will need to merge all logs toward "application.authentication".

[Normation-Quality-Assistant]

OK, merging this PR