Fix shortening references for return type in MakeTypeExplicitInLambdaIntention

#KT-5475 Fixed

idea/testData/intentions/makeTypeExplicitInLambda/shortenReferencesForReturnType.kt

@@ -0,0 +1,5 @@
+fun main(c: kotlin.support.AbstractIterator<Int>) {
+    val f = { <caret>(x: Int) -> c}
+}
+
+// WITH_RUNTIME

idea/testData/intentions/makeTypeExplicitInLambda/shortenReferencesForReturnType.kt.after

@@ -0,0 +1,7 @@
+import kotlin.support.AbstractIterator
+
+fun main(c: kotlin.support.AbstractIterator<Int>) {
+    val f = {(x: Int): AbstractIterator<Int> -> c}
+}
+
+// WITH_RUNTIME