Python: Update all metrics-dependant queries

The ones that no longer require points-to no longer import
`LegacyPointsTo`. The ones that do use the specific
`...MetricsWithPointsTo` classes that are applicable.

python/ql/src/Metrics/ModuleEfferentCoupling.ql

@@ -13,5 +13,5 @@
 import python
 private import LegacyPointsTo
 
-from ModuleMetrics m
+from ModuleMetricsWithPointsTo m
 select m, m.getEfferentCoupling() as n order by n desc