Fix compiler exception during resolution of ambiguous callable references

Function return type can't and should not be used during overload resolution of callable references.
Since it can be DeferredType, its substitution in CS caused exception.

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/results/FlatSignature.kt

@@ -16,8 +16,8 @@
 
 package org.jetbrains.kotlin.resolve.calls.results
 
+import org.jetbrains.kotlin.builtins.getAllParameterProjectionsFromCallableReflectionType
 import org.jetbrains.kotlin.container.DefaultImplementation
-import org.jetbrains.kotlin.container.PlatformExtensionsClashResolver
 import org.jetbrains.kotlin.container.PlatformSpecificExtension
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
 import org.jetbrains.kotlin.descriptors.MemberDescriptor
@@ -62,7 +62,7 @@ class FlatSignature<out T> constructor(
             return FlatSignature(
                 origin,
                 descriptor.typeParameters,
-                reflectionType.arguments.map { it.type }, // should we drop return type?
+                reflectionType.getAllParameterProjectionsFromCallableReflectionType().map { it.type },
                 hasExtensionReceiver = false,
                 hasVarargs = descriptor.valueParameters.any { it.varargElementType != null },
                 numDefaults = numDefaults,