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

compiler/testData/diagnostics/tests/override/DefaultParameterValueInOverride.fir.kt

@@ -0,0 +1,13 @@
+open class A {
+    open fun foo(a : Int) {}
+}
+
+class C : A() {
+    override fun foo(a : Int = 1) {
+    }
+}
+
+class D : A() {
+    override fun foo(a : Int = 1) {
+    }
+}