tests/avocado: update AArch64 tests to Alpine 3.17.2

tests/avocado: update AArch64 tests to Alpine 3.17.2

To test Alpine boot on SBSA-Ref target we need Alpine Linux
'standard' image as 'virt' one lacks kernel modules.

So to minimalize Avocado cache I move test to 'standard' image.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230302191146.1790560-1-marcin.juszkiewicz@linaro.org>
Message-Id: <20230315174331.2959-2-alex.bennee@linaro.org>