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

compiler/testData/codegen/box/diagnostics/functions/tailRecursion/multilevelBlocks.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 test(x : Int) : Int {
     if (x == 1) {
@@ -20,4 +21,4 @@ tailrec fun test(x : Int) : Int {
     return -1
 }
 
-fun box() : String = if (test(1000000) == -1) "OK" else "FAIL"
+fun box() : String = if (test(1000000) == -1) "OK" else "FAIL"