[JVM] Lower .entries calls on Kotlin enums

Leveraging the same mechanism with $EntriesMapping as Java enums.
Old (compiled with LV/AV < 1.8) enums are detected by looking for
static special <get-entries> method that cannot be introduced on
Kotlin enums otherwise

#KT-53236

compiler/testData/cli/jvm/enumEntriesNotEnabled.kt

@@ -0,0 +1,9 @@
+enum class MyEnum {
+    OK, NOPE
+}
+
+@OptIn(ExperimentalStdlibApi::class)
+fun box(): String {
+    val entries = MyEnum.entries
+    return "OK"
+}