Propagate KotlinType into if expression codegen for inline classes

compiler/testData/codegen/box/inlineClasses/correctBoxingForBranchExpressions.kt

@@ -0,0 +1,19 @@
+// !LANGUAGE: +InlineClasses
+
+interface Base {
+    fun result(): Int
+}
+
+inline class Inlined(val x: Int) : Base {
+    override fun result(): Int = x
+}
+
+fun foo(b: Boolean): Base {
+    return if (b) Inlined(0) else Inlined(1)
+}
+
+fun box(): String {
+    if (foo(true).result() != 0) return "Fail 1"
+    if (foo(false).result() != 1) return "Fail 2"
+    return "OK"
+}