Adjust testData to CharSequence.length transformation

compiler/testData/diagnostics/tests/inference/regressions/kt2407.kt

@@ -5,7 +5,7 @@ package n
 import java.util.*
 
 fun test() {
-    val foo = arrayList("").map { it -> it.length() }.fold(0, { x, y -> Math.max(x, y) })
+    val foo = arrayList("").map { it -> it.length }.fold(0, { x, y -> Math.max(x, y) })
     checkSubtype<Int>(foo)
     checkSubtype<String>(<!TYPE_MISMATCH!>foo<!>)
 }

compiler/testData/diagnostics/tests/inference/regressions/kt2484.kt

@@ -8,11 +8,11 @@ fun <T> Array<T>.forEach(operation: (T) -> Unit) : Unit { for (element in this)
 fun bar(operation: (String) -> Unit) = operation("")
 
 fun main(args: Array<String>) {
-    args.forEach { a : String -> a.length() } // Type mismatch: (String) -> Unit required, (String) -> Int found
-    args.forEach { a -> a.length() } // Type mismatch: (String) -> Unit required, (String) -> Int found
-    args.forEach { it.length() }     // This works!
+    args.forEach { a : String -> a.length } // Type mismatch: (String) -> Unit required, (String) -> Int found
+    args.forEach { a -> a.length } // Type mismatch: (String) -> Unit required, (String) -> Int found
+    args.forEach { it.length }     // This works!
 
-    bar { a: String -> a.length() }
-    bar { a -> a.length() }
-    bar { it.length() }
+    bar { a: String -> a.length }
+    bar { a -> a.length }
+    bar { it.length }
 }

compiler/testData/diagnostics/tests/inference/regressions/kt943.kt

@@ -9,8 +9,8 @@ import java.util.*
 
 fun foo(lines: List<String>) {
     val w = max(lines, comparator {o1, o2 ->
-        val l1 : Int = o1.length() // Types of o1 and o2 are ERROR
-        val l2 = o2.length()
+        val l1 : Int = o1.length // Types of o1 and o2 are ERROR
+        val l2 = o2.length
         l1 - l2
     }).sure()
     checkSubtype<String>(w)