Consider replacing Rusoto with aws-sdk-rust

[tommorris]

Rusoto has switched to maintenance only and the website is now down. Amazon now maintain their own SDK for AWS, aws-sdk-rust which is actively maintained although the README notes:

The SDK is currently released as a developer preview and is intended strictly for feedback purposes only. Do not use this SDK for production workloads

It might be worth considering replacing Rusoto with aws-sdk-rust, albeit flagging up the fact AWS do not current support it in the way they do SDKs for other languages like Python or Java.

[jwarlander]

Definitely makes sense, especially now that the AWS SDK for Rust is generally available, on version 1.x, and is fully supported.