Support SameSite cookie attribute in MockMvcHttpConnector

Closes gh-30264

spring-test/src/main/java/org/springframework/test/web/servlet/client/MockMvcHttpConnector.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -197,6 +197,7 @@ public class MockMvcHttpConnector implements ClientHttpConnector {
 							.path(cookie.getPath())
 							.secure(cookie.getSecure())
 							.httpOnly(cookie.isHttpOnly())
+							.sameSite(cookie.getAttribute("samesite"))
 							.build();
 			clientResponse.getCookies().add(httpCookie.getName(), httpCookie);
 		}