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

#KT-55662 Fixed

compiler/testData/diagnostics/tests/PropertyInitializers.fir.kt

@@ -0,0 +1,13 @@
+// WITH_STDLIB
+
+class Foo(val a: Int, b: Int) {
+    val c = a + b
+
+    val d: Int
+        get() = a
+
+    val e: Int
+        get() = <!UNRESOLVED_REFERENCE!>b<!>
+
+    val map: Map<String, Int> = <!INITIALIZER_TYPE_MISMATCH, TYPE_MISMATCH("kotlin/String; kotlin/Int"), TYPE_MISMATCH("kotlin/String; kotlin/Int"), TYPE_MISMATCH("kotlin/Int; kotlin/String"), TYPE_MISMATCH("kotlin/String; kotlin/Int"), TYPE_MISMATCH("kotlin/Int; kotlin/String")!>mapOf(1 to "hello")<!>
+}

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")<!>
+}

compiler/testData/diagnostics/tests/PropertyInitializers.txt

@@ -6,6 +6,7 @@ public final class Foo {
     public final val c: kotlin.Int
     public final val d: kotlin.Int
     public final val e: kotlin.Int
+    public final val map: kotlin.collections.Map<kotlin.String, kotlin.Int>
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String