PG18: propagate_statistics test failure, changed output for temp objects

[manaldush]

On PG18 commit d024160fffc behavior of StatisticsObjIsVisibleExt was changed, as a consequence the output for temp objects in propagate_statistics test was changed and test now is failed

 CREATE STATISTICS pg_temp.s1 (dependencies) ON a, b FROM test_stats;
-ERROR:  "statistics object s1" has dependency on unsupported object "schema pg_temp_xxx"
+ERROR:  "statistics object pg_temp_42.s1" has dependency on unsupported object "schema pg_temp_42"
 CREATE STATISTICS s1 (dependencies) ON a, b FROM test_stats;

this error I can see for release-12.1, release-13.0 and main. Better fix them all