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

compiler/testData/codegen/box/diagnostics/functions/tailRecursion/functionWithNonTailRecursions.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
 
 tailrec fun badTails(x : Int) : Int {
     if (x < 50 && x != 10 && x > 0) {
@@ -22,4 +23,4 @@ tailrec fun badTails(x : Int) : Int {
 fun box(): String {
     badTails(1000000)
     return "OK"
-}
+}