Move callable reference diagnostic tests to non-stdlib

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

@@ -0,0 +1,28 @@
+// !CHECK_TYPE
+// FILE: a.kt
+
+package first
+
+class A {
+    fun foo() {}
+    fun bar(<!UNUSED_PARAMETER!>x<!>: Int) {}
+    fun baz() = "OK"
+}
+
+// FILE: b.kt
+
+package other
+
+import kotlin.reflect.*
+
+import first.A
+
+fun main() {
+    val x = first.A::foo
+    val y = first.A::bar
+    val z = A::baz
+
+    checkSubtype<KMemberFunction0<A, Unit>>(x)
+    checkSubtype<KMemberFunction1<A, Int, Unit>>(y)
+    checkSubtype<KMemberFunction0<A, String>>(z)
+}