Updating CrownLabs VM images

[air-31]

Objective

To re-generate the existing VM images with the nfs-common package included and, preferably, the OS upgraded to Ubuntu-22.04 in order to enable further releases. Additionally, migrate the images from the old docker registry to the new one (Harbor).

Images to be updated:

• netgroup/cloud-kubernetes:20211130
• netgroup/cloud-docker:20201022
• netgroup/cloud-kvm:20201109
• netgroup/cloud-client:20201024
• netgroup/ttpu-os-2021:20210907
• netgroup/netlab:20210210
• netgroup/cloud-publish-website:20211221
• netgroup/ubuntu-server-base:20210722
• netgroup/vpn-client:20211203
• netgroup/reticalc:20201120
• netgroup/xubuntu-netprog:20211208
• netgroup/xubuntu-base:20200502
• netgroup/xubuntu-base-1804:20210106
• netgroup/network-simulations-lab:20200506
• digcomm/digcomm:20200501
• netgroup/aiis-abb:v0.1.0
• netgroup/polycube:20210201
• netgroup/onos:20210121
• netgroup/netlab:20200511
• netgroup/ubuntu-server-base:20200922
• francescoraviglione/ms-van3t:20221122t074856
• marcoiorio/xubuntu-base:20210504t111820

Note: All the images listed above are currently located in the old CrownLabs internal registry. An item's checkbox should be checked only once its updated counterpart has been created and uploaded to the new registry.