feat: force staging Cloud Run egress through VPC connector

Silvester Wainainarequested to merge
silvester/configure_cloud_run_ip_addresses into main

What

  • Force Cloud Run services in the staging environment to attach to the shared Serverless VPC connector
  • Route staging egress through the connector by defaulting the Cloud Run vpc_access block to ALL_TRAFFIC via locals
  • Remove reliance on runway.yml for staging VPC access while preserving existing behavior for production

Why

As part of 👉 team#696

Links to relevant issues

Edited by Silvester Wainaina

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