Move Java Example distroless Dataflow to Java21 precommit (#35001)

Author: Abacn

.github/workflows/beam_PreCommit_Java_Examples_Dataflow_Java21.yml

@@ -112,7 +112,7 @@ jobs:
     - name: Build and Test
       uses: ./.github/actions/gradle-command-self-hosted-action
       with:
-        gradle-command: :runners:google-cloud-dataflow-java:examples:preCommit
+        gradle-command: :runners:google-cloud-dataflow-java:examples:preCommit :runners:google-cloud-dataflow-java:examplesJavaDistrolessRunnerV2PreCommit
         arguments: |
           -PdisableSpotlessCheck=true \
           -PdisableCheckStyle=true \

build.gradle.kts

@@ -571,7 +571,6 @@ tasks.register("communityMetricsProber") {
 tasks.register("javaExamplesDataflowPrecommit") {
   dependsOn(":runners:google-cloud-dataflow-java:examples:preCommit")
   dependsOn(":runners:google-cloud-dataflow-java:examples-streaming:preCommit")
-  dependsOn(":runners:google-cloud-dataflow-java:examplesJavaDistrolessRunnerV2PreCommit")
   dependsOn(":runners:google-cloud-dataflow-java:examplesJavaRunnerV2PreCommit")
 }