Update RestTestClient builder hierarchy

Add concrete classes with specified generics for each MockMvc setup
Ensure Builder methods return the concrete class

See gh-34428

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

@@ -48,7 +48,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 class JsonPathAssertionTests {
 
 	private final RestTestClient client =
-			RestTestClient.standaloneSetup(new MusicController())
+			RestTestClient.bindToController(new MusicController())
 					.configureServer(builder ->
 							builder.alwaysExpect(status().isOk())
 									.alwaysExpect(content().contentType(MediaType.APPLICATION_JSON))

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/ErrorTests.java

@@ -30,7 +30,7 @@ import org.springframework.web.bind.annotation.RestController;
  */
 class ErrorTests {
 
-	private final RestTestClient client = RestTestClient.standaloneSetup(new TestController()).build();
+	private final RestTestClient client = RestTestClient.bindToController(new TestController()).build();
 
 
 	@Test

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/HeaderAndCookieTests.java

@@ -34,7 +34,7 @@ import org.springframework.web.bind.annotation.RestController;
  */
 class HeaderAndCookieTests {
 
-	private final RestTestClient client = RestTestClient.standaloneSetup(new TestController()).build();
+	private final RestTestClient client = RestTestClient.bindToController(new TestController()).build();
 
 	@Test
 	void requestResponseHeaderPair() {

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/JsonContentTests.java

@@ -42,7 +42,7 @@ import static org.hamcrest.Matchers.containsString;
  */
 class JsonContentTests {
 
-	private final RestTestClient client = RestTestClient.standaloneSetup(new PersonController()).build();
+	private final RestTestClient client = RestTestClient.bindToController(new PersonController()).build();
 
 
 	@Test

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/ResponseEntityTests.java

@@ -43,7 +43,7 @@ import static org.hamcrest.Matchers.startsWith;
  * @author Rob Worsnop
  */
 class ResponseEntityTests {
-	private final RestTestClient client = RestTestClient.standaloneSetup(new PersonController())
+	private final RestTestClient client = RestTestClient.bindToController(new PersonController())
 			.baseUrl("/persons")
 			.build();
 

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/RestTestClientTests.java

@@ -53,7 +53,7 @@ class RestTestClientTests {
 
 	@BeforeEach
 	void setUp() {
-		this.client = RestTestClient.standaloneSetup(new TestController()).build();
+		this.client = RestTestClient.bindToController(new TestController()).build();
 	}
 
 	@Nested

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/SoftAssertionTests.java

@@ -30,7 +30,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  */
 class SoftAssertionTests {
 
-	private final RestTestClient restTestClient = RestTestClient.standaloneSetup(new TestController()).build();
+	private final RestTestClient restTestClient = RestTestClient.bindToController(new TestController()).build();
 
 
 	@Test

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/XmlContentTests.java

@@ -58,7 +58,7 @@ class XmlContentTests {
 			""";
 
 
-	private final RestTestClient client = RestTestClient.standaloneSetup(new PersonController()).build();
+	private final RestTestClient client = RestTestClient.bindToController(new PersonController()).build();
 
 
 	@Test

spring-test/src/test/java/org/springframework/test/web/servlet/client/samples/bind/ControllerTests.java

@@ -36,7 +36,7 @@ class ControllerTests {
 
 	@BeforeEach
 	void setUp() {
-		this.client = RestTestClient.standaloneSetup(new TestController()).build();
+		this.client = RestTestClient.bindToController(new TestController()).build();
 	}