Allow SSO OAuth callback port override

[ashenm]

Fixes #9148

This change adds support allowing OAuth callback address port and host bind override used by parameters --redirect-port and --redirect-host respectively.

The main use case is containerized and remote development environments, where the default localhost callback port may not be suitable or easily reachable. By allowing the port to be configured externally, the login flow becomes more flexible across Docker, dev containers, remote workspaces, and other non-standard local setups.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[ashovlin]

Hey @ashenm, I'd prefer we start with an option like --redirect-port in #9148.

We try to ensure that AWS_ environment variables work across SDKs and tools, so if going with AWS_OAUTH_CALLBACK_SERVER_PORT we'd want to coordinate with at least the AWS Tools for PowerShell team, and update more documentation. Starting with just an AWS CLI option is simpler, and part of the generated documentation.

Will this approach work for your use case?

[ashenm]

@ashovlin got it! Updated adding --redirect-port and --redirect-host