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

compiler/testData/diagnostics/tests/java8Overrides/abstractBaseClassMemberNotImplemented.fir.kt

@@ -0,0 +1,9 @@
+abstract class ALeft {
+    abstract fun foo()
+}
+
+interface IRight {
+    fun foo() {}
+}
+
+class CDerived : ALeft(), IRight