chore(infra): migrate dev terraform state to remote GCS backend

- Replace dev/ config (wrong custom-VPC config) with the correct adopted
  cluster config that was previously living in dev-local/
- Migrate local terraform state from dev-local/ to remote GCS backend
  (gs://shipsec-tfstate-66676596284/infra/gcp/dev/)
- Remove dev-local/ — it was a misnomer; dev/ now manages the real cluster
- Add GCS FUSE addon, volumes bucket, job-runner SA, and IAM to dev/main.tf

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: betterclever <paliwal.pranjal83@gmail.com>

Author: betterclever