scripts: twister: west twister error codes match twister direct call

This commit fixes #54492 where return code 1 is returned
when twister tests fail when twister is called directly and
return code 0 in similar scenario but twister is invoked using
west.

Signed-off-by: Andrey Borisovich <andrey.borisovich@intel.com>

scripts/west_commands/twister_cmd.py

@@ -57,7 +57,8 @@ class Twister(WestCommand):
         )
 
         options = self._parse_arguments(args=remainder, options=args)
-        main(options)
+        ret = main(options)
+        sys.exit(ret)
 
     def _parse_arguments(self, args, options):
         """Helper function for testing purposes"""