[IR] Add body printing strategy to Kotlin-like dumper

compiler/testData/ir/irText/classes/enumWithSecondaryCtor.fir.kt.txt

@@ -96,6 +96,7 @@ abstract enum class Test2 : Enum<Test2> {
   }
 
   abstract fun foo()
+
   fun values(): Array<Test2> /* Synthetic body for ENUM_VALUES */
 
   fun valueOf(value: String): Test2 /* Synthetic body for ENUM_VALUEOF */