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

compiler/testData/diagnostics/tests/scopes/classHeader/classParents.fir.kt

@@ -0,0 +1,12 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+interface I<F, G, H>
+
+class A(impl: Interface) : Nested(), Interface by impl, Inner, I<Nested, Interface, Inner> {
+
+    class Nested
+
+    inner class Inner
+
+    interface Interface
+}