switch back meaning of reverse and search in warm

Also do'n try to warm up searches on reverse-only databases.

Fixes #3213.

nominatim/clicmd/admin.py

@@ -90,17 +90,20 @@ def _warm(self, args: NominatimArgs) -> int:
         api = napi.NominatimAPI(args.project_dir)
 
         try:
-            if args.target != 'reverse':
+            if args.target != 'search':
                 for _ in range(1000):
                     api.reverse((random.uniform(-90, 90), random.uniform(-180, 180)),
                                 address_details=True)
 
-            if args.target != 'search':
+            if args.target != 'reverse':
                 from ..tokenizer import factory as tokenizer_factory
 
                 tokenizer = tokenizer_factory.get_tokenizer_for_db(args.config)
                 with connect(args.config.get_libpq_dsn()) as conn:
-                    words = tokenizer.most_frequent_words(conn, 1000)
+                    if conn.table_exists('search_name'):
+                        words = tokenizer.most_frequent_words(conn, 1000)
+                    else:
+                        words = []
 
                 for word in words:
                     api.search(word)