When using `-experimental-skip-all-function-bodies` we don’t run the `TypeCheckSourceFileRequest` and thus don’t go through the decl checker, which calls `InheritedTypeRequest` on all inheritance clauses. This means that the inherited entries are not populated by the time we serialize the module. Trigger the computation of inherited entries by calling `InheritedTypeRequest` during serialization.
Unfortunately, we can’t use the type returned by `getResolvedType` for the serialization because `getResolvedType` returns an inverted protocol type for suppressed conformances but during serialization, we want to serialize the suppressed type with a `isSuppressedBit`. We thus need to call `getEntry(i).getType()` again to get the type to serialize.
rdar://141440011
