[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/callableReference/function/differentPackageTopLevel.fir.kt

@@ -0,0 +1,28 @@
+// !CHECK_TYPE
+// FILE: a.kt
+
+package first
+
+fun foo() {}
+fun bar(x: Int) {}
+fun baz() = "OK"
+
+// FILE: b.kt
+
+package other
+
+import kotlin.reflect.*
+
+import first.foo
+import first.bar
+import first.baz
+
+fun main() {
+    val x = ::foo
+    val y = ::bar
+    val z = ::baz
+
+    checkSubtype<KFunction0<Unit>>(x)
+    checkSubtype<KFunction1<Int, Unit>>(y)
+    checkSubtype<KFunction0<String>>(z)
+}