groovy: Add Java 21 images (#15523)

* Don't default to 21 yet (since missing architectures)

library/groovy

@@ -4,28 +4,39 @@ GitRepo: https://github.com/groovy/docker-groovy.git
 Tags: 4.0.15-jdk8, 4.0-jdk8, jdk8, 4.0.15-jdk8-jammy, 4.0-jdk8-jammy, jdk8-jammy
 GitFetch: refs/heads/master
 Architectures: amd64, arm32v7, arm64v8, ppc64le
-GitCommit: 66c1c4133dadcd3db4d320cf6680838f7d91e92b
+GitCommit: 0ea910f18590ad895816749d064dc14c77c435e3
 Directory: jdk8
 
 Tags: 4.0.15-jdk11, 4.0-jdk11, jdk11, 4.0.15-jdk11-jammy, 4.0-jdk11-jammy, jdk11-jammy
 GitFetch: refs/heads/master
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 66c1c4133dadcd3db4d320cf6680838f7d91e92b
+GitCommit: 0ea910f18590ad895816749d064dc14c77c435e3
 Directory: jdk11
 
 Tags: 4.0.15-jdk11-alpine, 4.0-jdk11-alpine, jdk11-alpine
 GitFetch: refs/heads/master
 Architectures: amd64
-GitCommit: 66c1c4133dadcd3db4d320cf6680838f7d91e92b
+GitCommit: 0ea910f18590ad895816749d064dc14c77c435e3
 Directory: jdk11-alpine
 
 Tags: 4.0.15-jdk17, 4.0-jdk17, jdk17, 4.0.15-jdk, 4.0-jdk, 4.0.15, 4.0, 4, jdk, latest, 4.0.15-jdk17-jammy, 4.0-jdk17-jammy, jdk17-jammy, 4.0.15-jdk-jammy, 4.0-jdk-jammy, 4.0.15-jammy, 4.0-jammy, 4-jammy, jdk-jammy, jammy
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 66c1c4133dadcd3db4d320cf6680838f7d91e92b
+GitCommit: 0ea910f18590ad895816749d064dc14c77c435e3
 Directory: jdk17
 
 Tags: 4.0.15-jdk17-alpine, 4.0-jdk17-alpine, jdk17-alpine, 4.0.15-jdk-alpine, 4.0-jdk-alpine, 4.0.15-alpine, 4.0-alpine, 4-alpine, jdk-alpine, alpine
 GitFetch: refs/heads/master
 Architectures: amd64
-GitCommit: 66c1c4133dadcd3db4d320cf6680838f7d91e92b
+GitCommit: 0ea910f18590ad895816749d064dc14c77c435e3
 Directory: jdk17-alpine
+
+Tags: 4.0.15-jdk21, 4.0-jdk21, jdk21, 4.0.15-jdk21-jammy, 4.0-jdk21-jammy, jdk21-jammy
+Architectures: amd64, arm64v8
+GitCommit: 0ea910f18590ad895816749d064dc14c77c435e3
+Directory: jdk21
+
+Tags: 4.0.15-jdk21-alpine, 4.0-jdk21-alpine, jdk21-alpine
+GitFetch: refs/heads/master
+Architectures: amd64, arm64v8
+GitCommit: 0ea910f18590ad895816749d064dc14c77c435e3
+Directory: jdk21-alpine