v26-final
ci: Add missing CI_RETRY_EXE before git clone
build: update retry to current version
ci: Pull in qtbase5-dev instead of seperate low-level libraries
ci: Remove no longer applicable section
doc: Add doc comment to ci/test_imagefile
lint: Add missing `set -ex` to ci/lint/06_script.sh
ci: Fix macOS-cross SDK rsync
ci: move-only CI_CONTAINER_ID to 02_run_container.sh