Merge patch series "test: cmd: Add test for zip/unzip/gzwrite commands"

Marek Vasut <marek.vasut+renesas@mailbox.org> says:

Enable zip command in sandbox so it is always build tested.
Add simple test for zip/unzip/gzwrite commands so they are
unit tested.

Link: https://lore.kernel.org/r/20260205014153.218621-1-marek.vasut+renesas@mailbox.org