Add Google Cloud Build capabilities via cloudbuild.yaml

[obriensystems]

command line

gcloud run deploy traffic-generation \
--image=northamerica-northeast1-docker.pkg.dev/magellan-01/traffic-generation/traffic-generation@sha256:74fb3.....f2a73 \
--allow-unauthenticated \
--service-account=5...4-compute@developer.gserviceaccount.com \
--max-instances=8 \
--no-cpu-throttling \
--execution-environment=gen2 \
--region=northamerica-northeast1 \
--project=magellan-01