[FIR] Render integer literal types as Int in diagnostic messages

#KT-55662 Fixed

compiler/testData/diagnostics/tests/PropertyInitializers.kt

@@ -1,4 +1,5 @@
-// FIR_IDENTICAL
+// WITH_STDLIB
+
 class Foo(val a: Int, b: Int) {
     val c = a + b
 
@@ -7,4 +8,6 @@ class Foo(val a: Int, b: Int) {
 
     val e: Int
         get() = <!UNRESOLVED_REFERENCE!>b<!>
-}
+
+    val map: Map<String, Int> = <!TYPE_MISMATCH("String; Int"), TYPE_MISMATCH("Int; String"), TYPE_MISMATCH("Map<String, Int>; Map<String, String>")!>mapOf(1 to "hello")<!>
+}