MXGDA-870 EPICS: Suppress type mismatch warnings from LazyPVs when using newBooleanFromEnumPV or newReadOnlyBooleanFromEnumPV
MXGDA-870 EPICS: Add newIntegerFromEnumPV factory method to LazyPVFactory

(Type mismatch warnings are suppressed when creating a LazyPV in this way.)