Make addRemote task configuration cache compatible (#101830)

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/InternalBwcGitPlugin.java

@@ -72,20 +72,19 @@ public class InternalBwcGitPlugin implements Plugin<Project> {
             createClone.commandLine("git", "clone", buildLayout.getRootDirectory(), gitExtension.getCheckoutDir().get());
         });
 
-        ExtraPropertiesExtension extraProperties = project.getExtensions().getExtraProperties();
         TaskProvider<LoggedExec> findRemoteTaskProvider = tasks.register("findRemote", LoggedExec.class, findRemote -> {
             findRemote.dependsOn(createCloneTaskProvider);
             findRemote.getWorkingDir().set(gitExtension.getCheckoutDir());
             findRemote.commandLine("git", "remote", "-v");
             findRemote.getCaptureOutput().set(true);
-            findRemote.doLast(t -> { extraProperties.set("remoteExists", isRemoteAvailable(remote, findRemote.getOutput())); });
+            findRemote.doLast(t -> System.setProperty("remoteExists", String.valueOf(isRemoteAvailable(remote, findRemote.getOutput()))));
         });
 
         TaskProvider<Task> addRemoteTaskProvider = tasks.register("addRemote", addRemote -> {
             String rootProjectName = project.getRootProject().getName();
 
             addRemote.dependsOn(findRemoteTaskProvider);
-            addRemote.onlyIf("remote exists", task -> ((boolean) extraProperties.get("remoteExists")) == false);
+            addRemote.onlyIf("remote exists", task -> (Boolean.valueOf(providerFactory.systemProperty("remoteExists").get()) == false));
             addRemote.doLast(new Action<Task>() {
                 @Override
                 public void execute(Task task) {