Themes(climbing): Recognize leisure=sports_hall

This commit just adds support to recognize `leisure=sports_hall`, it
doesn't add a preset. Imo `leisure=sports_hall` vs
`leisure=sports_centre` looks like a hot mess in many cases (there are
several forum threads about this question) and we shouldn't
bother MapComplete users with this when they want to add a climbing gym.

But there's one clear case where I'd even like to add this tag myself
(with JOSM): on halls within a larger sports_centre.
Sport Vlaanderen Brugge and Sportoase Leuven come to mind.

assets/layers/climbing_gym/climbing_gym.json

@@ -28,7 +28,12 @@
     "osmTags": {
       "and": [
         "sport=climbing",
-        "leisure=sports_centre"
+        {
+          "or": [
+            "leisure=sports_centre",
+            "leisure=sports_hall"
+          ]
+        }
       ]
     }
   },