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

[timtebeek]

Continuation of https://issues.apache.org/jira/browse/MNG-6829

Review requested of @elharo

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

[timtebeek]

Interesting failure mode here:

Running post-build script: /home/runner/work/maven-shade-plugin/maven-shade-plugin/target/it/MSHADE-36-inject-dep-reduced-pom-in-final/verify.bsh
java.lang.IllegalStateException: wanted path is missing: com/example/shaded/org/codehaus/plexus/util/StringUtils.class

maven-shade-plugin/src/it/projects/MSHADE-36-inject-dep-reduced-pom-in-final/verify.bsh

Lines 62 to 64 in f15f26b

	if ( pomFile.contains( "<groupId>org.codehaus.plexus</groupId>" ) )
	{
	throw new IllegalStateException( "The pom.xml still contains a reference to the org.codehaus.plexus dependency" );