[IR generator] Introduce constants for List-like types

compiler/ir/ir.tree/tree-generator/src/org/jetbrains/kotlin/ir/generator/model/Transformations.kt

@@ -65,15 +65,9 @@ private fun transformFieldConfig(fc: FieldConfig): Field = when (fc) {
     )
     is ListFieldConfig -> {
         val listType = when (fc.mutability) {
-            ListFieldConfig.Mutability.List -> type(
+            ListFieldConfig.Mutability.List -> StandardTypes.mutableList
-                "kotlin.collections",
+            ListFieldConfig.Mutability.Array -> StandardTypes.array
-                "MutableList",
+            else -> StandardTypes.list
-            )
-            ListFieldConfig.Mutability.Array -> type(
-                "kotlin.",
-                "Array",
-            )
-            else -> type("kotlin.collections", "List")
         }
         ListField(
             fc,

generators/tree-generator-common/src/org/jetbrains/kotlin/generators/tree/StandardTypes.kt

@@ -9,6 +9,9 @@ object StandardTypes {
     val boolean = type<Boolean>()
     val string = type<String>()
     val int = type<Int>()
+    val array = type<Array<*>>()
+    val list = type<List<*>>()
+    val mutableList = type("kotlin.collections", "MutableList")
     val collection = type<Collection<*>>()
     val map = type<Map<*, *>>()
 }