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

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

@@ -0,0 +1,18 @@
+// !CHECK_TYPE
+// FILE: a.kt
+
+package a.b.c
+
+class D {
+    fun foo() = 42
+}
+
+// FILE: b.kt
+
+import kotlin.reflect.KFunction1
+
+fun main() {
+    val x = a.b.c.D::foo
+
+    checkSubtype<KFunction1<a.b.c.D, Int>>(x)
+}