Adapt incremental upgrade manual test for the "one single SquashFS diff" upgrade scheme
Originally created by @anonym on #15285 (Redmine)
Feature Branch: feature/15281-single-squashfs-diff
Parent Task: #15281 (closed)
Originally created by @anonym on #15285 (Redmine)
Feature Branch: feature/15281-single-squashfs-diff
Parent Task: #15281 (closed)