Support inline classes as last expression in lambda

compiler/testData/codegen/bytecodeText/inlineClasses/boxUnboxInsideLambdaAsLastExpression.kt

@@ -0,0 +1,19 @@
+// !LANGUAGE: +InlineClasses
+
+inline class UInt(private val u: Int)
+
+fun test(x: UInt?, y: UInt) {
+    val a = run {
+        x!!
+    }
+
+    val b = run {
+        y
+    }
+}
+
+// 2 INVOKESTATIC UInt\$Erased.box
+// 3 INVOKEVIRTUAL UInt.unbox
+
+// 0 valueOf
+// 0 intValue