Remove backend tests on old inference

Also remove any mentions of NewInference, and rename some tests.

compiler/testData/codegen/box/inference/capturedStarProjection.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // WITH_RUNTIME
 
 interface A<T> {
@@ -11,4 +10,4 @@ fun test(a: A<*>) {
 
 fun box(): String {
     return "OK"
-}
+}