Backport remove dockerproject (#5682)

* Remove dockerproject org (#5548)

* Change dockerproject.org to download.docker.com

dockerproject.org was deprecated in 2017 and has gone down.

* Restore yum repo for containerd

Change-Id: I883bb512a2164a85865b1bd4fb569af0358c8c2b

Co-authored-by: Craig Rodrigues <rodrigc@crodrigues.org>

* remove legacy docker repo in kubernetes/preinstall before any packages installed (#5640)

* Remove dockerproject_.+_repo_.+ variables (#5662)

This 38688a44

 change replaces the
value for dockerproject_.+_repo_.+ docker variables but their new
value was previously defined in other variables. This change removes
the dockerproject_.+_repo_.+ docker variables in favor of the older
ones.

* Remove stale legacy yum docker repo /etc/yum.repos.d/docker.repo (#5569)

* Remove stale legacy yum docker repo /etc/yum.repos.d/docker.repo

* move task 'Remove legacy docker repo file' to pre-upgrade.yml

* fix upgrade procedure when in playbook (#5695)

exists role kubernetes/preinstall and not exists role container-engine

 error 'yum_repo_dir' is undefined

Co-authored-by: Matthew Mosesohn <matthew.mosesohn@gmail.com>
Co-authored-by: Craig Rodrigues <rodrigc@crodrigues.org>
Co-authored-by: Victor Morales <chipahuac@hotmail.com>