refactor(assets): Optimize list_microgrid_electrical_component_connections method

This commit refactors the `list_microgrid_electrical_component_connections` method in the `AssetsApiClient` class to use `map` and `filter` for improved readability and performance. The method now filters out any falsey connections before mapping them to the appropriate component connection objects.

Signed-off-by: eduardiazf <[email protected]>

Author: eduardiazf

src/frequenz/client/assets/_client.py

@@ -175,7 +175,9 @@ async def list_microgrid_electrical_component_connections(
             method_name="ListMicrogridElectricalComponentConnections",
         )
 
-        return [
-            component_connection_from_proto(connection)
-            for connection in response.connections
-        ]
+        return list(
+            map(
+                component_connection_from_proto,
+                filter(bool, response.connections),
+            )
+        )