Bump groovy-all from 2.4.20 to 2.4.21

Bumps [groovy-all](https://github.com/apache/groovy) from 2.4.20 to 2.4.21.
- [Release notes](https://github.com/apache/groovy/releases)
- [Commits](https://github.com/apache/groovy/commits)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

e2e/pom.xml

@@ -73,7 +73,7 @@
                     <dependency>
                         <groupId>org.codehaus.groovy</groupId>
                         <artifactId>groovy-all</artifactId>
-                        <version>2.4.20</version>
+                        <version>2.4.21</version>
                     </dependency>
                 </dependencies>
             </plugin>