Migrate testdata to new lambda syntax

compiler/testData/codegen/boxWithStdlib/arrays/kt4118.kt

@@ -1,10 +1,10 @@
 fun Array<String>.test1(): Array<String> {
-    val func = {(i:Int) -> this}
+    val func = { i:Int  -> this}
     return func(1)
 }
 
 fun Array<String>.test1Nested(): Array<String> {
-    val func = {(i:Int) -> { this }()}
+    val func = { i: Int -> { this }()}
     return func(1)
 }
 
@@ -71,7 +71,7 @@ fun Array<String>.test4Nested() : Array<String> {
 }
 
 fun Array<DoubleArray>.test1(): Array<DoubleArray> {
-    val func = {(i:Int) -> this}
+    val func = { i: Int -> this}
     return func(1)
 }
 

compiler/testData/codegen/boxWithStdlib/regressions/generic.kt

@@ -16,6 +16,6 @@ fun box(): String {
   list.add("Moscow")
   list.add("Munich")
 
-  val m: ArrayList<String> = list.findAll<String>({(name: String) -> name.startsWith("M")})
+  val m: ArrayList<String> = list.findAll<String>({ name: String -> name.startsWith("M")})
   return if (m.size() == 2) "OK" else "fail"
 }