Compatibility warning for references to companion via name (KT-13934)

(cherry picked from commit 718f23b34f)

compiler/testData/codegen/box/callableReference/function/referenceToCompanionMember.kt

@@ -0,0 +1,32 @@
+// WITH_RUNTIME
+// IGNORE_BACKEND_FIR: JVM_IR
+// IGNORE_BACKEND: JS
+
+class A {
+    companion object {
+        fun foo(): String = "OK"
+    }
+}
+
+class B {
+    companion object {
+        fun foo(): String = "Fail"
+    }
+}
+
+fun B.foo(): String = "OK"
+
+fun call(f: Any): String = if (f is Function0<*>) f.invoke() as String else (f as Function1<B, String>).invoke(B())
+
+fun box(): String {
+    val call1 = call(A::foo)
+    if (call1 != "OK") return "fail 1: $call1"
+
+    // Checking compatibility mode: should be resolved to extensions in 1.4
+    val call2 = call(B::foo)
+    if (call2 != "OK") return "fail 2: $call2"
+
+    return "OK"
+}
+
+