[FIR] Support static getters along with fake Enum.entries declaration in FIR

#KT-48872

compiler/testData/ir/irText/classes/enumEntries.kt

@@ -0,0 +1,12 @@
+// FIR_IDENTICAL
+// !LANGUAGE: +EnumEntries
+// TARGET_BACKEND: JVM_IR
+// FULL_JDK
+// WITH_STDLIB
+
+enum class MyEnum {
+    Ok, Nope
+}
+
+@OptIn(ExperimentalStdlibApi::class)
+fun box() = MyEnum.entries