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

compiler/testData/diagnostics/tests/ValAndFunOverrideCompatibilityClash.fir.kt

@@ -0,0 +1,9 @@
+// JAVAC_EXPECTED_FILE
+class Foo1() : java.util.ArrayList<Int>()
+
+open class Bar() {
+    fun v() : Int  = 1
+    val v : Int = 1
+}
+
+class Barr() : Bar() {}