Move callable reference diagnostic tests to non-stdlib

compiler/testData/diagnostics/tests/callableReference/function/constructorFromExtensionInClass.kt

@@ -0,0 +1,23 @@
+// !CHECK_TYPE
+
+import kotlin.reflect.KFunction0
+
+class A
+
+class B {
+    fun A.ext() {
+        val x = ::A
+        val y = ::B
+
+        checkSubtype<KFunction0<A>>(x)
+        checkSubtype<KFunction0<B>>(y)
+    }
+    
+    fun B.ext() {
+        val x = ::A
+        val y = ::B
+
+        checkSubtype<KFunction0<A>>(x)
+        checkSubtype<KFunction0<B>>(y)
+    }
+}