Partial body resolve filter: more correct lambda resolve for return

idea/testData/resolve/partialBodyResolve/ReturnLambda.dump

@@ -0,0 +1,3 @@
+Resolve target: value-parameter val p: kotlin.String? smart-cast to kotlin.String
+Skipped statements:
+println()

idea/testData/resolve/partialBodyResolve/ReturnLambda.kt

@@ -0,0 +1,9 @@
+fun foo(p: String?): () -> String {
+    if (p == null) {
+        return {
+            println()
+            "a"
+        }
+    }
+    <caret>p.size
+}