WithAwsPlugin - Add configurable duration (or other options) for longer sessions

[jantman]

The WithAwsPlugin currently only supports specifying the role (ARN) parameter for the underlying withAws pipeline step.

This results in credentials that are only valid for 1 hour, and problematic issues with long-running operations like creating RDS read instances... at worst, if using S3 remote state, a single operation that takes longer than an hour results in the credentials expiring and not being able to update the state file. This means the state file is out of sync, and may result in orphaned resources.

The simple fix here would be to allow withRole to take an optional integer duration parameter which is passed on to withAws(). Even better would be to allow withRole to accept any additional parameters (e.g. externalId, roleSessionName, etc.) that withAws() accepts, and pass them through to the underlying withAws() call.

(Opening this issue for a colleague, I didn't experience it myself.)