Add type hints for Reactor's Traces class

Closes gh-1098

Author: sdeleuze

spring-native-configuration/src/main/java/org/springframework/boot/test/SpringBootTestHints.java

@@ -195,13 +195,6 @@ public List<HintDeclaration> computeHints(TypeSystem typeSystem) {
 				hintDeclaration.addDependantType("org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTypeExcludeFilter", new AccessDescriptor(AccessBits.LOAD_AND_CONSTRUCT));
 				hints.add(hintDeclaration);
 			}
-			if (typeSystem.resolve("reactor/core/publisher/Traces", true) != null) {
-				HintDeclaration hintDeclaration = new HintDeclaration();
-				hintDeclaration.addDependantType("reactor.core.publisher.Traces$StackWalkerCallSiteSupplierFactory", new AccessDescriptor(AccessBits.LOAD_AND_CONSTRUCT));
-				hintDeclaration.addDependantType("reactor.core.publisher.Traces$SharedSecretsCallSiteSupplierFactory", new AccessDescriptor(AccessBits.LOAD_AND_CONSTRUCT));
-				hintDeclaration.addDependantType("reactor.core.publisher.Traces$ExceptionCallSiteSupplierFactory", new AccessDescriptor(AccessBits.LOAD_AND_CONSTRUCT));
-				hints.add(hintDeclaration);
-			}
 		}
 		List<HintDeclaration> testHints = TypeProcessor.namedProcessor("Tests")
 				.skipTypesMatching(type -> type.getMethodsWithAnnotationName("org.junit.jupiter.api.Test", false).isEmpty())

spring-native-configuration/src/main/java/reactor/core/publisher/ReactorCoreHints.java

@@ -0,0 +1,15 @@
+package reactor.core.publisher;
+
+import org.springframework.nativex.hint.NativeHint;
+import org.springframework.nativex.hint.TypeHint;
+import org.springframework.nativex.type.NativeConfiguration;
+
+@NativeHint(trigger = Traces.class, types = {
+		@TypeHint(types = {
+				Traces.StackWalkerCallSiteSupplierFactory.class,
+				Traces.SharedSecretsCallSiteSupplierFactory.class,
+				Traces.ExceptionCallSiteSupplierFactory.class
+		})
+})
+public class ReactorCoreHints implements NativeConfiguration {
+}

spring-native-configuration/src/main/resources/META-INF/services/org.springframework.nativex.type.NativeConfiguration

@@ -124,3 +124,4 @@ org.springframework.transaction.annotation.TransactionManagementHints
 org.springframework.web.bind.annotation.WebAnnotationHints
 org.springframework.web.socket.WebSocketHints
 org.thymeleaf.ThymeleafHints
+reactor.core.publisher.ReactorCoreHints