Update OS images to Ubuntu 22.04 and remove Equinix Metal and Civo providers

Changelog for 0.8.29:

• Civo does not give out public IPs which are required for tunnel servers, nor does it have proper user-data support
• Equinix Metal (bare-metal in general) is far too expensive to use for a single tunnel server so defeats the purpose of this tool

Commits
f98ff84 Remove Civo and Equinix Metal by @alexellis
269e928 Update scaleway to 22.04 by @alexellis
21e5293 Update GCE to Ubuntu 22.04 by @alexellis
2c75116 Update vultr to Ubuntu 22.04 by @alexellis
d99ba37 Update Linode to Ubuntu 22.04 by @alexellis
d5cc6ee Update to Ubuntu 22.04 for Azure by @alexellis
29ae118 Migrate to CX22 for Hetzner and ubuntu 22.04 by @alexellis

Changes: 0.8.28...0.8.29

Generated by Derek