Fix #146020: bad assert for supported socket types

The tree-type argument for the `supports_socket_type` type should be
allowed to be anything. There doesn't seem to be a great benefit in
restricting it. Always returning false when the tree type is not supported
makes sense.

In addition it would also be good to double-check that one can't add
the bundle and closure nodes in the compositor yet. From my basic tests,
that seems to work as expected.

source/blender/nodes/geometry/include/NOD_geo_bundle.hh

@@ -41,7 +41,6 @@ inline bool socket_type_supported_in_bundle(const eNodeSocketDatatype socket_typ
                   SOCK_CLOSURE,
                   SOCK_INT);
     default:
-      BLI_assert_unreachable();
       return false;
   }
 }

source/blender/nodes/geometry/include/NOD_geo_closure.hh

@@ -41,7 +41,6 @@ inline bool socket_type_supported_in_closure(const eNodeSocketDatatype socket_ty
                   SOCK_CLOSURE,
                   SOCK_INT);
     default:
-      BLI_assert_unreachable();
       return false;
   }
 }

source/blender/nodes/geometry/include/NOD_geo_repeat.hh

@@ -94,7 +94,6 @@ struct RepeatItemsAccessor : public socket_items::SocketItemsAccessorDefaults {
                     SOCK_CLOSURE,
                     SOCK_INT);
       default:
-        BLI_assert_unreachable();
         return false;
     }
   }