JVM IR: Handle overloaded values functions in MappedEnumWhenLowering

Fixes KT-46579.

compiler/testData/codegen/box/enum/overloadedEnumValues.kt

@@ -0,0 +1,14 @@
+enum class E {
+    A;
+
+    fun values(b: Boolean) {}
+    fun E.values(): Array<E> = arrayOf(A)
+}
+
+fun f(e: E) = when (e) {
+    E.A -> "OK"
+}
+
+fun box(): String {
+    return f(E.A)
+}