[CodeCompletion] Call hasStorage instead of getImplInfo().hasStorage() to determine if a variable is stored

This uncovered a discrepancy between `getImplInfo().hasStorage()` and `hasStorage()`.

Author: ahoppen

lib/IDE/CompletionLookup.cpp

@@ -2251,7 +2251,7 @@ void CompletionLookup::foundDecl(ValueDecl *D, DeclVisibilityKind Reason,
     return;
   case LookupKind::StoredProperty:
     if (auto *VD = dyn_cast<VarDecl>(D)) {
-      if (VD->getImplInfo().hasStorage()) {
+      if (VD->hasStorage()) {
         addVarDeclRef(VD, Reason, dynamicLookupInfo);
       }
       return;

lib/Sema/TypeCheckStorage.cpp

@@ -3533,7 +3533,8 @@ bool HasStorageRequest::evaluate(Evaluator &evaluator,
       storage->getParsedAccessor(AccessorKind::Address) ||
       storage->getParsedAccessor(AccessorKind::Set) ||
       storage->getParsedAccessor(AccessorKind::Modify) ||
-      storage->getParsedAccessor(AccessorKind::MutableAddress))
+      storage->getParsedAccessor(AccessorKind::MutableAddress) ||
+      storage->getParsedAccessor(AccessorKind::Init))
     return false;
 
   // willSet or didSet in an overriding property imply that there is no storage.