Remove compiler warnings for spring-security-webauthn

Closes gh-18442

Signed-off-by: Jay Choi <jayyoungchoi22@gmail.com>

webauthn/spring-security-webauthn.gradle

@@ -1,4 +1,5 @@
 plugins {
+	id 'compile-warnings-error'
 	id 'security-nullability'
 }
 

webauthn/src/test/java/org/springframework/security/web/webauthn/authentication/WebAuthnAuthenticationFilterTests.java

@@ -101,6 +101,7 @@ class WebAuthnAuthenticationFilterTests {
 	}
 
 	@Test
+	@SuppressWarnings("removal")
 	void setConverterWhenNullThenIllegalArgumentException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> this.filter.setConverter((GenericHttpMessageConverter<Object>) null));

webauthn/src/test/java/org/springframework/security/web/webauthn/jackson/CredProtectAuthenticationExtensionsClientInputJackson2Tests.java

@@ -29,6 +29,7 @@ import org.springframework.security.web.webauthn.api.ImmutableAuthenticationExte
  *
  * @author Rob Winch
  */
+@SuppressWarnings("removal")
 class CredProtectAuthenticationExtensionsClientInputJackson2Tests {
 
 	private ObjectMapper mapper;

webauthn/src/test/java/org/springframework/security/web/webauthn/jackson/Jackson2Tests.java

@@ -44,6 +44,7 @@ import org.springframework.security.web.webauthn.api.UserVerificationRequirement
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+@SuppressWarnings("removal")
 class Jackson2Tests {
 
 	private ObjectMapper mapper;