Fix
- **ec2.delete_instances.discover_image_snapshots.exception**: Change image.image_id to image.id
- **ec2.delete_instances.cli**: Revert the original cli interface
- **ec2.delete_instances.discover_image_snapshots**: Skip snapshot retrieval for images not in 'available' state
- **ec2.delete_instances**: Add 'disable_protections' parameter allowing disabling of termination and stop API protections before deletion