[FIR2IR] Properly generate GetObject expression for callable reference on companion object

^KT-55909 Fixed

compiler/testData/codegen/box/callableReference/serializability/referenceToCompanionFunction.kt

@@ -0,0 +1,33 @@
+// IGNORE_BACKEND_K1: ANY
+// FE 1.0 incorrectly resolves reference `Some::foo` (KT-45315)
+// DONT_TARGET_EXACT_BACKEND: WASM
+// WASM_MUTE_REASON: Wasm box test does not support disabling only K1 mode with IGNORE_BACKEND directive
+// ISSUE: KT-55909
+// DUMP_IR
+
+abstract class Base {
+    fun foo(): String = "A"
+    abstract fun bar(): String
+}
+
+class Some {
+    companion object : Base() {
+        override fun bar(): String = "B"
+    }
+}
+
+// For sanity check
+object Singleton : Base() {
+    override fun bar(): String = "C"
+}
+
+fun box(): String {
+    val ref1 = Some::foo
+    val ref2 = Some::bar
+    val ref3 = Some.Companion::foo
+    val ref4 = Some.Companion::bar
+    val ref5 = Singleton::foo
+    val ref6 = Singleton::bar
+    val result = ref1() + ref2() + ref3() + ref4() + ref5() + ref6()
+    return if (result == "ABABAC") "OK" else "Fail: $result"
+}