Do not try computing return type in OverloadChecker

Return type is not needed for checking overloads, but querying it may
involve resolving function bodies, which usually happens after overload
checking (see LazyTopDownAnalyzer.analyzeDeclarations) and at this point
can lead to incorrect BACKING_FIELD_REQUIRED value being computed for
some properties (see KT-27895)

 #KT-27895 Fixed

compiler/frontend/src/org/jetbrains/kotlin/resolve/OverloadChecker.kt

@@ -55,7 +55,9 @@ class OverloadChecker(val specificityComparator: TypeSpecificityComparator) {
         // They can be disambiguated by providing explicit type parameters.
         if (a.typeParameters.isEmpty() != b.typeParameters.isEmpty()) return true
 
-        if (ErrorUtils.containsErrorType(a) || ErrorUtils.containsErrorType(b)) return true
+        if (a is FunctionDescriptor && ErrorUtils.containsErrorTypeInParameters(a) ||
+            b is FunctionDescriptor && ErrorUtils.containsErrorTypeInParameters(b)
+        ) return true
         if (a.varargParameterPosition() != b.varargParameterPosition()) return true
 
         val aSignature = FlatSignature.createFromCallableDescriptor(a)