systests: manifest zstd test: lots of tiny cleanups #19861
Merged
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Primarily, build test images FROM scratch, not alpine, to
avoid image pulls and network flakes and potential pull-
the-rug-out errors if the base alpine image changes.
This was much more complicated than it should've been,
because creating unique arch-specific FROM-scratch images
triggered a weird manifest bug, filed as #19860.
Also:
reason behind my diving in here. Such a simple thing, I thought.)
Signed-off-by: Ed Santiago santiago@redhat.com