Introduce FIR_IDENTICAL for FIR vs old frontend tests #KT-36879 Fixed

compiler/testData/diagnostics/tests/deparenthesize/annotatedSafeCall.fir.kt

@@ -1,7 +0,0 @@
-@Target(AnnotationTarget.EXPRESSION)
-@Retention(AnnotationRetention.SOURCE)
-annotation class foo
-
-fun f(s : String?) : Boolean {
-    return (@foo s?.equals("a"))!!
-}

compiler/testData/diagnostics/tests/deparenthesize/annotatedSafeCall.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 @Target(AnnotationTarget.EXPRESSION)
 @Retention(AnnotationRetention.SOURCE)
 annotation class foo

compiler/testData/diagnostics/tests/deparenthesize/multiParenthesizedSafeCall.fir.kt

@@ -1,3 +0,0 @@
-fun f(s : String?) : Boolean {
-    return (((s?.equals("a"))))!!
-}

compiler/testData/diagnostics/tests/deparenthesize/multiParenthesizedSafeCall.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 fun f(s : String?) : Boolean {
     return (((s?.equals("a"))))!!
 }

compiler/testData/diagnostics/tests/deparenthesize/parenthesizedSafeCall.fir.kt

@@ -1,3 +0,0 @@
-fun f(s : String?) : Boolean {
-    return (s?.equals("a"))!!
-}

compiler/testData/diagnostics/tests/deparenthesize/parenthesizedSafeCall.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 fun f(s : String?) : Boolean {
     return (s?.equals("a"))!!
 }