fix: update promotion workflow to output promotion status

[botanical]

What Changed

• I updated the promotion workflow to output a status so we know if it succeeds or fails
• I fixed the issue with the transfer setting in the payload (the payload is wrapped within the conf field)
• I updated the pr.yml workflow to exit gracefully if no file changes are found to publish/promote

Testing

I tested the promote-collection.py script locally with python3 ./scripts/promote_collection.py ingestion-data/staging/dataset-config/test-sm2a-staging.json "production" but would like to see the promote.yml workflow run through github actions entirely

[github-actions]

Workflow Status

Starting workflow... View action run

🕵️ No new files found. No files will be published to staging or promoted to production.

[anayeaye]

I think this path restriction should be enough to prevent running the job when a PR doesn't involve ingestion data changes?

name: Publish collection to staging

on:
  pull_request:
    branches: ['main']
    paths:
      # Run the workflow only if files inside this path are updated
      - ingestion-data/staging/dataset-config/*

https://github.com/NASA-IMPACT/veda-data/blob/main/.github/workflows/pr.yml#L16