workaround mypy error on statement using sqlalchemy.select

```
lib/galaxy/managers/interactivetool.py:65: error: No overload variant of
"select" matches argument type "ReadOnlyColumnCollection[str, Column[Any]]"
```

lib/galaxy/managers/interactivetool.py

@@ -62,7 +62,7 @@ def get(self, key, key_type):
         columns = ("token", "host", "port", "info")
 
         with self._engine.connect() as conn:
-            query = select(gxitproxy.c[columns]).where(
+            query = select(*gxitproxy.c[columns]).where(
                 gxitproxy.c["key"] == key,
                 gxitproxy.c["key_type"] == key_type,
             )