Need for the JDK support of CreateSession API of the service IAM Roles Anywhere

### Describe the feature

For using [CreateSession API of the service IAM Roles Anywhere](https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html) AWS recommends to use the standalone tool **aws_signing_helper**. It is well integrated because is a part of standard ~/.aws/config file.

But in some cases it ist not compliant with security regulations due to starting of extra programs.

Surprisingly this Java SDK, as well as other AWS SDKs don't provide a support for Create Session API. Why not?

Please include the support of **CreateSession API of the service IAM Roles Anywhere** to the SDK.

### Use Case

In some cases it ist not compliant with security regulations due to starting of extra programs. I would like to call CreateSession API on my own, f.e. at the boot phase of a program, without the extra process aws_signing_helper **is** started.

### Proposed Solution

On the Internet there are a couple of solution, people have implemented for work around this problem.

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### AWS Java SDK version used

2

### JDK version used

17

### Operating System and version

MacOS

Non sono indicati file del repository né test. Inizia dalla documentazione collegata dell’API CreateSession e dalla copertura di AWS Java SDK v2 per IAM Roles Anywhere; determina il comportamento richiesto della richiesta e della risposta, quindi verifica il supporto con test per una chiamata in-process che non avvii aws_signing_helper.

Scritto dal modello di indicizzazione a partire dal testo della issue.