[test] Add additional volume slide tests

Add tests for volume slides with 8-bit parameter, fine volume slide
and secondary volume.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Cleanup: remove tar depacking support

Usage of tar to archive modules isn't common practice in any relevant
platform.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>