Clarify reproduce info on Windows

This commit correct the test failure reproduction line on Windows.

Relates #28104

Author: jasontedor

buildSrc/src/main/groovy/org/elasticsearch/gradle/vagrant/VagrantTestPlugin.groovy

@@ -1,7 +1,12 @@
 package org.elasticsearch.gradle.vagrant
 
+import org.apache.tools.ant.taskdefs.condition.Os
 import org.elasticsearch.gradle.FileContentsTask
-import org.gradle.api.*
+import org.gradle.api.GradleException
+import org.gradle.api.InvalidUserDataException
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.Task
 import org.gradle.api.artifacts.dsl.RepositoryHandler
 import org.gradle.api.execution.TaskExecutionAdapter
 import org.gradle.api.internal.artifacts.dependencies.DefaultProjectDependency
@@ -356,8 +361,9 @@ class VagrantTestPlugin implements Plugin<Project> {
             TaskExecutionAdapter packagingReproListener = new TaskExecutionAdapter() {
                 @Override
                 void afterExecute(Task task, TaskState state) {
+                    final String gradlew = Os.isFamily(Os.FAMILY_WINDOWS) ? "gradlew" : "./gradlew"
                     if (state.failure != null) {
-                        println "REPRODUCE WITH: ./gradlew ${packaging.path} " +
+                        println "REPRODUCE WITH: ${gradlew} ${packaging.path} " +
                             "-Dtests.seed=${project.extensions.esvagrant.formattedTestSeed} "
                     }
                 }

test/framework/src/main/java/org/elasticsearch/test/junit/listeners/ReproduceInfoPrinter.java

@@ -20,6 +20,7 @@
 
 import com.carrotsearch.randomizedtesting.ReproduceErrorMessageBuilder;
 import org.apache.logging.log4j.Logger;
+import org.apache.lucene.util.Constants;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.test.ESIntegTestCase;
@@ -72,7 +73,8 @@ public void testFailure(Failure failure) throws Exception {
             return;
         }
 
-        final StringBuilder b = new StringBuilder("REPRODUCE WITH: ./gradlew ");
+        final String gradlew = Constants.WINDOWS ? "gradlew" : "./gradlew";
+        final StringBuilder b = new StringBuilder("REPRODUCE WITH: " + gradlew + " ");
         String task = System.getProperty("tests.task");
         // TODO: enforce (intellij still runs the runner?) or use default "test" but that won't work for integ
         b.append(task);