Merge branch v2.11 into v3.4

Dockerfile

docs/check.Dockerfile

docs/content/deprecation/releases.md

...ce/dynamic-configuration/kubernetes-crd-definition-v1.yml

docs/content/reference/dynamic-configuration/kv-ref.md

docs/content/reference/dynamic-configuration/kv.md

...ference/dynamic-configuration/traefik.io_middlewares.yaml

docs/docs.Dockerfile

integration/fixtures/k8s/01-traefik-crd.yml

internal/gendoc.go

pkg/config/dynamic/middlewares.go

pkg/provider/kv/redis/redis.go