Added a Katacontainers e2e flow figure, the figure can be used in many places or simply just as a reference.
It contains pieces from Kata 1.x and Kata 2.0 (e.g., kata-monitor).
The figures are produced via excalidraw.com, also in the commit is the
source .excalidraw which can be used to modify the figure if needed.
Fixes#1185
Signed-off-by: Adel Zaalouk <azaalouk@redhat.com>
