Support overload ambiguity resolution for callable references by expected type.

Resolve callable references taking into account expected callable types.

This affects call resolution procedure (resolve 'foo' in for 'foo(::bar)') similar to the approach used for function literals:

* During "shape arguments" phase of call resolution, callable references are resolved in independent context without expected type. If the callable reference is ambiguous, its shape type is a function placeholder type without parameter types and return type information. Otherwise, it is a reflection type for the resolved function or property. Upper-level call is resolved without taking into account ambiguous callable references.

* During "complete call" phase of call resolution, resolve callable reference arguments to actual descriptors (if possible), and update constraint system for the given call accordingly.

 #KT-6982 Fixed
 #KT-5780 Fixed

compiler/testData/diagnostics/tests/callableReference/property/returnTypeDependentOnGenericProperty.kt

@@ -0,0 +1,8 @@
+import kotlin.reflect.KProperty1
+
+fun <T, R> getProperty(x: T, property: KProperty1<T, R>): R =
+        property.get(x)
+
+class Person(val name: String)
+
+val name1 = getProperty(Person("John Smith"), Person::name)

compiler/testData/diagnostics/tests/callableReference/property/returnTypeDependentOnGenericProperty.txt

@@ -0,0 +1,12 @@
+package
+
+internal val name1: kotlin.String
+internal fun </*0*/ T, /*1*/ R> getProperty(/*0*/ x: T, /*1*/ property: kotlin.reflect.KProperty1<T, R>): R
+
+internal final class Person {
+    public constructor Person(/*0*/ name: kotlin.String)
+    internal final val name: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/callableReference/property/syntheticProperties.kt

@@ -0,0 +1,19 @@
+// FILE: Customer.java
+public class Customer {
+    private String name;
+
+    public Customer(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
+
+// FILE: test.kt
+val customerName = Customer::name

compiler/testData/diagnostics/tests/callableReference/property/syntheticProperties.txt

@@ -0,0 +1,13 @@
+package
+
+internal val customerName: kotlin.reflect.KMutableProperty1<Customer, kotlin.String!>
+
+public open class Customer {
+    public constructor Customer(/*0*/ name: kotlin.String!)
+    private final var name: kotlin.String!
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open fun getName(): kotlin.String!
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open fun setName(/*0*/ name: kotlin.String!): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}