feat: Do not rely on k0s file uploads - instead use curl

[onedr0p]

• k0s file uploads are inconsistent, use curl instead
  • Using curl allows use to set the hostname in /etc/hosts
  • containerd config is part of apply-system.sh
• Move bootstrap_github_repository_branch to advanced config flags
• Only skip tests that rely on secrets
• Update taskfiles around venv tasks
• Update readme to commit and push after running configure