Get rid of deprecated annotations in testData

compiler/testData/codegen/junit/kt1592.kt

@@ -1,3 +1,3 @@
 import org.junit.Test
 
-Test fun foo(m : java.lang.reflect.Method) = "OK"
+@Test fun foo(m : java.lang.reflect.Method) = "OK"

compiler/testData/codegen/junit/kt2344.kt

@@ -2,7 +2,7 @@ import kotlin.test.*
 import org.junit.Test as test
 
 public class Test {
-    test fun f(): Unit {
+    @test fun f(): Unit {
         assertEquals(true, !false)
     }
 }