[Test] Enable reporting errors from fronted to testdata of codegen tests

compiler/testData/codegen/box/diagnostics/functions/tailRecursion/defaultArgsOverridden.kt

@@ -5,6 +5,7 @@
 // TODO: muted automatically, investigate should it be ran for JS or not
 // DONT_RUN_GENERATED_CODE: JS
 // IGNORE_BACKEND: JS
+// IGNORE_FIR_DIAGNOSTICS_DIFF
 
 open class A {
     open fun foo(s: String = "OK") = s
@@ -16,4 +17,4 @@ class B : A() {
     }
 }
 
-fun box() = B().foo("FAIL")
+fun box() = B().foo("FAIL")