Scar

* Minor code improvements
* Fix minor errors in image runtime
* Fix error checking supervisor version in run command in case if image runtime 384

- Add tests
- Container runtime support
- Support for Alpine images using the container runtime
- Allow creating a function inside a VPC https://github.com/grycap/scar/issues/364
- Access EFS storage from within container https://github.com/grycap/scar/issues/360
- Multiple improvements (details in https://github.com/grycap/scar/pull/374)

- Updated config file to define OSCAR servers
- Updated 'init', 'rm' and 'ls' commands to work with OSCAR (hybrid workflows)
- Add hybrid example (mask-detector-workflow)

Ability to set configuration path through environment variable 355 (Thanks WinstonN)

- Avoid mixed configurations when parsing multiple functions from the same YAML.