Remove error page security filter

Spring Security now re-applies the authorization rules
to the error page by default. Additionally, it configures
RequestAttributeSecurityContextRepository as the default for
stateless applications allowing those applications to have access
to the original authentication during an error dispatch.

Closes gh-31703

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-web-secure/src/test/java/smoketest/web/secure/AbstractErrorPageTests.java

@@ -65,15 +65,6 @@ abstract class AbstractErrorPageTests {
 		assertThat(jsonResponse).isNull();
 	}
 
-	@Test
-	void testPublicNotFoundPage() {
-		final ResponseEntity<JsonNode> response = this.testRestTemplate.exchange(this.pathPrefix + "/public/notfound",
-				HttpMethod.GET, null, JsonNode.class);
-		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.NOT_FOUND);
-		JsonNode jsonResponse = response.getBody();
-		assertThat(jsonResponse.get("error").asText()).isEqualTo("Not Found");
-	}
-
 	@Test
 	void testPublicNotFoundPageWithCorrectCredentials() {
 		final ResponseEntity<JsonNode> response = this.testRestTemplate.withBasicAuth("username", "password")

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-web-secure/src/test/java/smoketest/web/secure/CustomServletPathErrorPageTests.java

@@ -47,7 +47,6 @@ class CustomServletPathErrorPageTests extends AbstractErrorPageTests {
 			http.authorizeHttpRequests((requests) -> {
 				requests.antMatchers("/custom/servlet/path/public/**").permitAll();
 				requests.anyRequest().fullyAuthenticated();
-				requests.shouldFilterAllDispatcherTypes(false);
 			});
 			http.httpBasic();
 			http.formLogin((form) -> form.loginPage("/custom/servlet/path/login").permitAll());

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-web-secure/src/test/java/smoketest/web/secure/ErrorPageTests.java

@@ -46,7 +46,6 @@ class ErrorPageTests extends AbstractErrorPageTests {
 			http.authorizeHttpRequests((requests) -> {
 				requests.antMatchers("/public/**").permitAll();
 				requests.anyRequest().fullyAuthenticated();
-				requests.shouldFilterAllDispatcherTypes(false);
 			});
 			http.httpBasic();
 			http.formLogin((form) -> form.loginPage("/login").permitAll());

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-web-secure/src/test/java/smoketest/web/secure/NoSessionErrorPageTests.java

@@ -48,7 +48,6 @@ class NoSessionErrorPageTests extends AbstractErrorPageTests {
 					.authorizeHttpRequests((requests) -> {
 						requests.antMatchers("/public/**").permitAll();
 						requests.anyRequest().authenticated();
-						requests.shouldFilterAllDispatcherTypes(false);
 					});
 			http.httpBasic();
 			return http.build();