Introduce new interface NamedExecutable

Introduce new interface NamedExecutable that associates a name, a
payload and an Executable.

This was introduced to help colocate test's diplayName, payload, and
testExecutor in one place. Concrete usage of this interface is in the
next commit.

Issue: junit-team#3261

junit-jupiter-api/src/main/java/org/junit/jupiter/api/NamedExecutable.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2015-2024 the original author or authors.
+ *
+ * All rights reserved. This program and the accompanying materials are
+ * made available under the terms of the Eclipse Public License v2.0 which
+ * accompanies this distribution and is available at
+ *
+ * https://www.eclipse.org/legal/epl-v20.html
+ */
+
+package org.junit.jupiter.api;
+
+import static org.apiguardian.api.API.Status.EXPERIMENTAL;
+
+import org.apiguardian.api.API;
+import org.junit.jupiter.api.function.Executable;
+
+/**
+ * {@code NamedExecutable} is a container that associates a name, a payload and an
+ * {@link Executable}
+ *
+ * @param <T> the type of the payload
+ *
+ * @since 5.11
+ */
+@API(status = EXPERIMENTAL, since = "5.11")
+public interface NamedExecutable<T extends NamedExecutable<T>> extends Named<T>, Executable {
+	@Override
+	default String getName() {
+		return toString();
+	}
+}