K2: link via signatures if -Xlink-via-signatures is set

Related to KT-53505

compiler/testData/codegen/box/fir/linkViaSignatures.kt

@@ -0,0 +1,26 @@
+// WITH_STDLIB
+// TARGET_BACKEND: JVM_IR
+// LINK_VIA_SIGNATURES
+
+class Class
+interface Interface
+sealed class Sealed<T>
+enum class E { ENTRY }
+
+fun function(s: String): Array<Int> {
+    fun Boolean.local() {}
+    return arrayOf(s.length)
+}
+typealias S = String
+var property: S? = "OK"
+
+fun box(): String {
+    val c = Class()
+    val o = object : Interface {}
+    if (property != "OK") return property!!
+    if (E.ENTRY.ordinal != 0) return E.ENTRY.ordinal.toString()
+    val result = function("AlphaBeta")
+    if (result.size != 1) return result.size.toString()
+    if (result[0] != 9) return result[0].toString()
+    return "OK"
+}