Move callable reference diagnostic tests to non-stdlib

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

@@ -0,0 +1,13 @@
+// !CHECK_TYPE
+
+import kotlin.reflect.KMemberFunction0
+
+class A<T>(val t: T) {
+    fun foo(): T = t
+}
+
+fun bar() {
+    val x = A<String>::foo
+
+    checkSubtype<KMemberFunction0<A<String>, String>>(x)
+}