cmd/rofl/deploy: Check instance expired before lengthy push to OCI repository

Problem:
```bash
Pushing ROFL app to OCI repository 'rofl.sh/ae7a1d62-1cdd-4ab9-8f12-d7fc2c81e4a8:1782767593'...
Pushing... 100.00% 84.53 MiB   ] 
Deploying into existing machine: 0000000000000641
Error: Machine instance not found.
Tip: If your instance expired, run this command with --replace-machine flag to replace it with a new machine.
```