SNOW-2306184: config refactor - allow empty connections

Author: sfc-gh-mraba

src/snowflake/cli/api/config_provider.py

@@ -448,8 +448,8 @@ def _get_connection_dict_internal(self, connection_name: str) -> Dict[str, Any]:
             connections[connection_name], dict
         ):
             result = connections[connection_name]
-            if result:
-                return result
+            # Allow empty connections - they're valid (just have no parameters set)
+            return result
 
         raise MissingConfigurationError(
             f"Connection {connection_name} is not configured"