"Remove redundant '.let' call" intention: handle it inside function call

So #KT-20583 Fixed

idea/testData/intentions/replaceSingleLineLetIntention/functionCall2.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    s.let { foo(it, 1)<caret> }
+}