Replace :

private RepositorySystem newRepositorySystem() {
    final var locator = MavenRepositorySystemUtils.newServiceLocator();
    locator.addService(RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class);
    locator.addService(TransporterFactory.class, FileTransporterFactory.class);
    locator.addService(TransporterFactory.class, HttpTransporterFactory.class);
    return locator.getService(RepositorySystem.class);
}

with

 private RepositorySystem newRepositorySystem() {
        RepositorySystemSupplier repositorySystemSupplier = new RepositorySystemSupplier();
        return repositorySystemSupplier.get();
 }

hope this saves your precious time for discovering other alternatives