fix: Added service target group ARNs as outputs for HAS and Swarm

[henrykie]

Issue number:
N/A

Summary

Small fix to expose ECS service target groups as outputs for Helix Swarm and Helix Core.

Changes

Please provide a summary of what's being changed

• Added Helix Swarm target group output: target_group_arn
• Added Helix Authentication Service target group output: target_group_arn

User experience

Please share what the user experience looks like before and after this change

Users looking to share an application load balancer across services can now leverage the output target groups to forward traffic to the underlying services.

Checklist

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• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Is this a breaking change?

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