psi2ir: Fix return insertion

We should only insert a return statement at the end of a lambda or
function if the final statement is used as an expression (slice
USED_AS_RESULT_OF_LAMBDA and USED_AS_EXPRESSION).

compiler/testData/codegen/boxInline/smap/anonymous/lambda.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND_MULTI_MODULE: JVM_IR
+
 // FILE: 1.kt
 
 package builders

compiler/testData/codegen/boxInline/smap/anonymous/object.kt

@@ -1,6 +1,6 @@
 // FILE: 1.kt
 
-// IGNORE_BACKEND_MULTI_MODULE: JVM_IR
+
 package builders
 
 inline fun call(crossinline init: () -> Unit) {

compiler/testData/codegen/boxInline/smap/newsmap/mappingInInlineFunLambda.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND_MULTI_MODULE: JVM_IR
+
 // FILE: 1.kt
 
 package test