When doing OCP upgrade on EUS versions, sometimes it is required to add a middle version between the current and target version.

For example:

current OCP version 4.14
target OCP version 4.16

Sometimes in order to upgrade from 4.14 to 4.16 it is required a version in the middle like 4.15.8 and this version needs to be included in the ImageSetConfiguration when using oc-mirror.

The current algorithm in oc-mirror is not accurate enough to give this information, so the proposal is to add a warning in the command line and in the docs about using the cincinnati graph web page to check if there are versions in the middle when upgrading OCP EUS versions and adding it to the ImageSetConfiguration.