Use AWS SDK Kotlin to interact AWS services

[hantsy]

Amazon provides AWS SDK Kotlin, which rewrites AWS SDK from scratch using Kotlin, I think it is a better match for this project.

AWS SDK Kotlin supports Kotlin Coroutines and Kotlin Multiple Platform.

Please replace the AWS SDK Java with AWS SDK Kotlin.

[mrFlick72]

Hi, @hantsy thanks for your feedback I was unaware there was a Kotlin-specific aws SDK.

I add your ticket to the 0.8 release train

[mrFlick72]

During the implementation, I discovered one dependency from other libraries used in VAuthenticator.
Mainly https://github.com/VAuthenticator/document-repository-starter that uses the java SDK.

I decided to postpone the implementation until this dependency is migrated to kotlin.