[FE 1.0] Don't try to compute value parameters for variables while creating a flat signature for the overload resolution

^KT-50172 Fixed

compiler/testData/codegen/box/callableReference/kt50172.kt

@@ -0,0 +1,11 @@
+// WITH_STDLIB
+
+fun g(s: String): List<String> {
+    fun f(x: String): String = x + "K"
+
+    val f = f(s)
+    return listOf(s).map(::f)
+}
+
+fun box(): String =
+    g("O").first()