Don't fallback to CHPs

Neither the client nor the data sourcing actor support reading data
from CHPs.  So we can't fallback to CHPs yet.

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

src/frequenz/sdk/timeseries/formula_engine/_formula_generators/_formula_generator.py

@@ -215,8 +215,7 @@ def _get_meter_fallback_components(self, meter: Component) -> set[Component]:
 
         # All fallbacks has to be of the same type and category.
         if (
-            all(graph.is_chp(c) for c in successors)
-            or all(graph.is_pv_inverter(c) for c in successors)
+            all(graph.is_pv_inverter(c) for c in successors)
             or all(graph.is_battery_inverter(c) for c in successors)
             or all(graph.is_ev_charger(c) for c in successors)
         ):