Upgrade Skopeo binary (currently embedded in fetchcode-container)

[tdruez]

While working on #1675, I've noticed that the Skopeo binary used in ScanCode.io, as provided by fetchcode-container v1.2.3 is quite old.

1. The first approach is to upgrade the binary directly in fetchcode-container.

2. A second possibility would be to directly install Skopeo in the SCIO Docker image, and using the FETCHCODE_SKOPEO_PATH to use this Skopeo binary instead.

$ apt-get -y install skopeo
$ skopeo --version
$ skopeo version 1.9.3. # Oct 19, 2022

3. A third option would be to run skopeo as a docker compose service using the latest image.

docker run --rm quay.io/skopeo/stable:latest --version
skopeo version 1.19.0

[Monal-Reddy]

hi @tdruez , i have worked on this in scancode plugins and tested it , a few additional dependencies were needed for v1.9.3 during the build process, please review aboutcode-org/scancode-plugins#56 when you find time and do let me know if any changes are required.