[pentest] Rework KMAC SCA

KMAC SCA was still based on the older version of the pentest framework
where speed was important. These changes bring kmac sca to a similar
state like aes sca. The key is always provided for example.
This change also includes extra testing features such as allowing longer
message inputs or the ability to add customization strings as input.
The testing is also improved to allow random input testing against the
python library.

Signed-off-by: Siemen Dhooghe <sdhooghe@google.com>
(cherry picked from commit 765a240)

Author: siemen11