Upgrade plugins (#18037)

* frontend-maven-plugin to 1.15.1
* license-maven-plugin to 4.6
https://github.com/mathieucarbou/license-maven-plugin/releases
* maven-clean-plugin to 3.4.0
https://github.com/apache/maven-clean-plugin/releases/tag/maven-clean-plugin-3.4.0
* maven-dependency-plugin to 3.8.1
* maven-deploy-plugin to 3.1.3
* maven-enforcer-plugin to 3.5.0
https://github.com/apache/maven-enforcer/releases
* maven-failsafe-plugin to 3.5.2
* maven-install-plugin to 3.1.3
https://github.com/apache/maven-install-plugin/releases
* maven-jar-plugin to 3.4.2
https://github.com/apache/maven-jar-plugin/releases/tag/maven-jar-plugin-3.4.2
* maven-javadoc-plugin to 3.11.2
* maven-release-plugin to 3.1.1
* maven-site-plugin to 3.21.0
* maven-surefire-plugin to 3.5.2
* build-helper-maven-plugin to 3.6.0
https://github.com/mojohaus/build-helper-maven-plugin/releases/tag/3.6.0

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

itests/pom.xml

@@ -81,7 +81,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-dependency-plugin</artifactId>
-        <version>3.6.1</version>
+        <version>3.8.1</version>
         <executions>
           <execution>
             <id>unpack-eea</id>