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

#KT-55662 Fixed

compiler/fir/cones/src/org/jetbrains/kotlin/fir/renderer/ConeTypeRenderer.kt

@@ -126,12 +126,8 @@ open class ConeTypeRenderer {
                 builder.append("Stub (subtyping): ${type.constructor.variable}")
             }
 
-            is ConeIntegerLiteralConstantType -> {
-                builder.append("ILT: ${type.value}")
-            }
-
-            is ConeIntegerConstantOperatorType -> {
-                builder.append("IOT")
+            is ConeIntegerLiteralType -> {
+                render(type)
             }
         }
         if (type !is ConeFlexibleType && type !is ConeErrorType) {
@@ -210,4 +206,16 @@ open class ConeTypeRenderer {
             }
         }
     }
+
+    protected open fun render(type: ConeIntegerLiteralType) {
+        when (type) {
+            is ConeIntegerLiteralConstantType -> {
+                builder.append("ILT: ${type.value}")
+            }
+
+            is ConeIntegerConstantOperatorType -> {
+                builder.append("IOT")
+            }
+        }
+    }
 }

compiler/fir/cones/src/org/jetbrains/kotlin/fir/renderer/ConeTypeRendererWithJavaFlexibleTypes.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.fir.renderer
 
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.fir.types.ConeFlexibleType
+import org.jetbrains.kotlin.fir.types.ConeIntegerLiteralType
 import org.jetbrains.kotlin.renderer.replacePrefixesInTypeRepresentations
 import org.jetbrains.kotlin.renderer.typeStringsDifferOnlyInNullability
 
@@ -73,4 +74,8 @@ class ConeTypeRendererWithJavaFlexibleTypes : ConeTypeRenderer {
 
         return "ft<$lowerRendered, $upperRendered>"
     }
+
+    override fun render(type: ConeIntegerLiteralType) {
+        render(type.getApproximatedType())
+    }
 }