new kyua import

Hi,

It looks like the kyua repo here has received a number of bug fixes
since kyua was last re-imported back into the base system.  It looks
like neither the base system copy nor devel/kyua in the ports tree is
being kept up to date with https://github.com/freebsd/kyua.

In particular, we're missing a fix for
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273481 which is
available in github.  That bug is causing occasional failed CI runs.

Would anyone volunteer to import the latest version of kyua into the
base system?