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

compiler/testData/diagnostics/tests/defaultArguments/kt5232.fir.kt

@@ -0,0 +1,11 @@
+interface A {
+    fun visit(a:Int, b:String="") : String = b + a
+}
+
+class B : A {
+    override fun visit(a:Int, b:String) : String = b + a
+}
+
+class C : A {
+    override fun visit(a:Int) : String = "" + a
+}