stdlib: reduce test log on gh

- enable cte_track
- redirect logger events out of terminal output

Author: u3s

lib/stdlib/test/stdlib_gh.spec

@@ -7,3 +7,6 @@
              "Benchmark only"}.
 {skip_cases, "../stdlib_test", gen_server_SUITE,
  [multicall_remote_old1],"Broken in docker"}.
+{event_handler, {cte_track, []}}.
+{enable_builtin_hooks, false}.
+{ct_hooks, [{cth_log_redirect, [{mode, replace}]}]}.