Add DelegatingServerAuthenticationConverter

Closes gh-14644

Author: kse-music

web/src/test/java/org/springframework/security/web/server/authentication/DelegatingServerAuthenticationConverterTests.java

@@ -80,8 +80,8 @@ public void applyServerHttpBasicAuthenticationConverterWhenFirstAuthenticationCo
 	@Test
 	public void applyApkServerAuthenticationConverterThenDelegate2NotInvokedAndError() {
 		Mono<Authentication> result = this.converter.convert(MockServerWebExchange.from(this.request.header("APK", "")
-				.header(HttpHeaders.AUTHORIZATION, "Basic dXNlcjpwYXNzd29yZA==")
-				.build()));
+			.header(HttpHeaders.AUTHORIZATION, "Basic dXNlcjpwYXNzd29yZA==")
+			.build()));
 		StepVerifier.create(result.cast(ApkTokenAuthenticationToken.class))
 			.expectError(ApkAuthenticationException.class)
 			.verify();