feat: Add Light Bridge release pipeline

[wsdt]

Overview

Since we switch over to DockerHub, I created this pipeline to automate it just as we did for the Faucet.

Workflow is only triggered on release or when we want to trigger it specifically. And will be aborted if there are no changes in the teleportation folder.

Also extending this for an actual aws deployment in a separate pr.

Changes

• Add Github workflow for light bridge Docker build
• Remove orphaned code
• Add optional env to ops/docker-compose*-side.yml

Testing

Fully tested in a personal repository.