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

compiler/testData/diagnostics/testsWithStdLib/annotations/prohibitPositionedArgument/kotlinAnnotation.fir.kt

@@ -1,5 +0,0 @@
-annotation class Ann(val x: Int, val value: String, val y: Double)
-
-@Ann(value = "a", x = 1, y = 1.0) fun foo1() {}
-@Ann(2, "b", 2.0) fun foo2() {}
-@Ann(3, "c", y = 2.0) fun foo3() {}

compiler/testData/diagnostics/testsWithStdLib/annotations/prohibitPositionedArgument/kotlinAnnotation.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 annotation class Ann(val x: Int, val value: String, val y: Double)
 
 @Ann(value = "a", x = 1, y = 1.0) fun foo1() {}