Add Support for IAM Roles Anywhere CreateSession

### Describe the feature

Add native support for [CreateSession](https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html) to the SDK.

### Use Case

We would like to leverage IAM Roles Anywhere to "bootstrap" AWS credentials into our external services that are written in Ruby. We are unable to use the [precanned credential_process binaries](https://docs.aws.amazon.com/rolesanywhere/latest/userguide/credential-helper.html).

### Proposed Solution

_No response_

### Other Information

_No response_

### Acknowledgements

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

### SDK version used

3.122.0

### Environment details (OS name and version, etc.)

Linux