Pass data flow info from '::' expressions, fix expected type

compiler/testData/diagnostics/tests/callableReference/bound/dataFlow.kt

@@ -0,0 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+import kotlin.reflect.KClass
+
+fun f1(x: String?): String {
+    x!!::hashCode
+    return <!DEBUG_INFO_SMARTCAST!>x<!>
+}
+
+fun f2(y: String?): String {
+    val f: KClass<*> = (y ?: return "")::class
+    return <!DEBUG_INFO_SMARTCAST!>y<!>
+}

compiler/testData/diagnostics/tests/callableReference/bound/dataFlow.txt

@@ -0,0 +1,4 @@
+package
+
+public fun f1(/*0*/ x: kotlin.String?): kotlin.String
+public fun f2(/*0*/ y: kotlin.String?): kotlin.String

compiler/testData/diagnostics/tests/callableReference/bound/expectedType.kt

@@ -0,0 +1,12 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+import kotlin.reflect.KClass
+
+fun test(s: String) {
+    val f: () -> Int = s::hashCode
+    val g: () -> String = s::toString
+    val h: (Any?) -> Boolean = s::equals
+
+    val k: KClass<String> = s::class
+    val l: KClass<*> = s::class
+}

compiler/testData/diagnostics/tests/callableReference/bound/expectedType.txt

@@ -0,0 +1,3 @@
+package
+
+public fun test(/*0*/ s: kotlin.String): kotlin.Unit