Make repo compliant

[RaphaelVogel]

What this PR does / why we need it:

• Deleted NOTICE.md file
• Updated CONTRIBUTING.md file
• Created/Updated LICENSE file
  • Deleted LICENSE.md file
• Created/Updated .reuse/dep5 file
• Created/Updated LICENSES folder
• Added badge for reuse compliance in README.md file and registered repo with REUSE API
• License/Copyright header replacement for 'non-go' files
  • dockerfile-configs/common-components.yaml
  • dotfiles/.tmux.conf
  • dotfiles/.bashrc
  • dotfiles/.bash_prompt
  • dotfiles/.bash_aliases
  • dotfiles/.tmux.statusline
  • dotfiles/.bash_profile
  • hacks/pb
  • hacks/install_k9s
  • hacks/kb
  • hacks/install_etcdctl
  • hacks/ops-pod
  • hacks/ghelp
  • hacks/find-and-show-in-guide
  • generator/generate-dockerfile.py
  • generator/validate-tools.py
  • generator/lib/config_parser.py
  • generator/lib/init.py
  • generator/lib/dockerfile.py
  • generator/lib/components.py
  • generator/lib/commands.py
  • generator/lib/validation.py