Resolve "Modify pipeline to use Project API token in dev"

Overview

Related issues

Closes #490 (closed)

Testing

• Confirm secret is being properly propagated:

kubectl create secret docker-registry -n default my-secret --docker-server=gitlab.com --docker-username=testuser --docker-password=verycooltestpass --docker-email=testuser@company.com
NO_TRAP="yes" REGISTRY_AUTH_SECRET=my-secret TESTS_NAMESPACE="foobar" sh -x scripts/test.sh create_namespace
kubectl get secret -n foobar my-secret

• Run full pipeline against MR in .com
• Run full pipeline for the branch mirror in dev with REGISTRY_AUTH_SECRET=dev-registry-pull-secret

Acceptance criteria

• Review namespace is created with pre-populated secret in dev environment
• Review runs clean in non-dev environment
• [ ] REGISTRY_AUTH_SECRET: dev-registry-pull-secret is set for the pipeline in dev
• Review runs clean in dev environment