Modify veda-routes to not depend on github action job outputs

[botanical]

In order to make deploying veda-routes more modular and not reliant on previous actions' values (such as veda-data-airflow), update the current configuration to not depend on github action job outputs.

Acceptance Criteria

• veda-routes step is modified to use env var values if the previous outputs aren't available https://github.com/NASA-IMPACT/veda-deploy/blob/dev/.github/workflows/deploy.yml#L424-L426

For example,

--raster_api_url=${{ jobs.deploy-veda-backend.outputs.raster_api_url if jobs.deploy-veda-backend.outputs else env.raster_api_url }}