Nodes to api-server relies by default certificates, and bootstrap
tokens, and there should be no need to generate tokens for every nodes,
even when enabling static token auth.

Also remove the group from the example inventory, since it should not be
needed anymore.

K8s is moving away from the "master" terminology, so kubespray should follow the same naming conventions. See https://github.com/kubernetes/community/blob/65d886bb3029e73d9729e1d4f27422a7985233ed/sig-architecture/naming/recommendations/001-master-control-plane.md

Use a style file as recommended by upstream. This makes for only one
source of truth.
Conserve previous upstream default for MD007 (upstream default changed
here https://github.com/markdownlint/markdownlint/pull/373)

- markdownlint (manual fix)
- end-of-file-fixer
- requirements-txt-fixer
- trailing-whitespace