Don't randomize statelss by default, trying to improve stability

also slightly increased default stateless test case timeout

Author: strtgbb

tests/clickhouse-test

@@ -3087,7 +3087,7 @@ def do_run_tests(
         # because the distribution and the amount
         # of failures will be nearly the same for all tests from the group.
         # TODO: add shuffle for sequential tests
-        if jobs > 1:
+        if jobs > 1 and args.order == "random":
             random.shuffle(test_suite.parallel_tests)
 
         batch_size = len(test_suite.parallel_tests) // jobs
@@ -3723,7 +3723,7 @@ def parse_args():
         "-t",
         "--timeout",
         type=int,
-        default=600,
+        default=800,
         help="Timeout for each test case in seconds",
     )
     parser.add_argument(