This commit removes the invalid information about
the recommended way of upgrading ScyllaDB
images (by updating ScyllaDB and OS packages
in one step) from the 5.x.y-to-5.x.y upgrade guide.
This upgrade procedure is not supported (it was
implemented, but then reverted).
Refs https://github.com/scylladb/scylladb/issues/15733
In addition, the following files are removed as no longer
necessary (they were only created to incorporate the (invalid)
information about image upgrade into the upgrade guides.
/upgrade/_common/upgrade-image-opensource.rst
/upgrade/_common/upgrade-guide-v5-patch-ubuntu-and-debian-p1.rst
/upgrade/_common/upgrade-guide-v5-patch-ubuntu-and-debian-p2.rst
/upgrade/_common/upgrade-guide-v5-patch-ubuntu-and-debian.rst
(cherry picked from commit dd1207cabb)
6628bee308