Colorize the Github test output

Let's color our workflow test output for better readability.

Reviewed by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #13000

scripts/Makefile.am

@@ -18,7 +18,8 @@ EXTRA_SCRIPTS = \
 	make_gitrev.sh \
 	man-dates.sh \
 	paxcheck.sh \
-	mancheck.sh
+	mancheck.sh \
+	zfs-tests-color.sh
 
 EXTRA_DIST = \
 	cstyle.pl \