[MNG-6829] Replace StringUtils#isEmpty(String) & #isNotEmpty(String) (#40)

Last batch of is(Not)Empty for https://issues.apache.org/jira/browse/MNG-6829
These are the smallest change sets, hence why I opened more at the same time.
After this we can target the next most often used method from the StringUtils classes.


Use this link to re-run the recipe: https://public.moderne.io/recipes/org.openrewrite.java.migrate.apache.commons.lang.IsNotEmptyToJdk?organizationId=QXBhY2hlIE1hdmVu

Co-authored-by: Moderne <[email protected]>

Author: timtebeek

src/main/java/org/apache/maven/plugins/deploy/DeployFileMojo.java

@@ -269,7 +269,7 @@ public void execute() throws MojoExecutionException, MojoFailureException {
             ArtifactType artifactType =
                     session.getRepositorySession().getArtifactTypeRegistry().get(packaging);
             if (artifactType != null
-                    && StringUtils.isEmpty(classifier)
+                    && (classifier == null || classifier.isEmpty())
                     && !StringUtils.isEmpty(artifactType.getClassifier())) {
                 classifier = artifactType.getClassifier();
             }