Release v22.11.6

[oscarpicas]

This PR:

• images based on Ubuntu 22.04 are valid now
• fixes several disk sizing problems creating clusters
• fixes several problems in machine provisioning scripts
• introduces grpc-web interface
• fixes several metadata corruption issues
• removes python3-setuptools
• improves command 'safescale tenant list'
• cleans documentation
• changes docker build scripts
• fixes problems validating inputs
• bumps dependencies

[oscarpicas]

Cluster creation OK