Fix boxing for non-local and labeled returns with inline classes

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

@@ -0,0 +1,29 @@
+// !LANGUAGE: +InlineClasses
+
+inline class ULong(val l: Long)
+
+fun nonLocal(): ULong? {
+    val u1 = ULong(1)
+
+    run {
+        return u1 // box
+    }
+
+    ULong(-1)
+}
+
+fun foo(): Boolean = true
+
+fun labeled(): ULong? {
+    val u = ULong(2)
+    return run {
+        if (foo()) return@run u
+        ULong(-1) // box
+    }
+}
+
+fun box(): String {
+    if (nonLocal()!!.l != 1L) return "fail"
+    if (labeled()!!.l != 2L) return "fail"
+    return "OK"
+}