Draft: [v9_16] Disable algorithm randomization for system tests on Windows

Our images with Windows lack python - do not execute get_algorithms.py there to avoid issues.

verified in pipeline: https://gitlab.isc.org/isc-projects/bind9/-/pipelines/119212

This fixes an issue introduced with a 9.16 backport of !6994 (merged)

Related #3503 (closed)