[FlINK-36392] drop JDK version from image tag.

The images built here are local to the minikube cluster and thus don't conflict with each other.

Author: SamBarker

.github/workflows/ci.yml

@@ -164,7 +164,7 @@ jobs:
           export DOCKER_BUILDKIT=1
           eval $(minikube -p minikube docker-env)
           JAVA_VERSION=${{ matrix.java-version }}
-          docker build --progress=plain --no-cache -f ./Dockerfile -t flink-kubernetes-operator:ci-${{ matrix.java-version }}-latest --progress plain -- -build-arg JAVA_VERSION="${JAVA_VERSION:-11}" .
+          docker build --progress=plain --no-cache -f ./Dockerfile -t flink-kubernetes-operator:ci-latest --progress plain -- -build-arg JAVA_VERSION="${JAVA_VERSION:-11}" .
           docker images
       - name: Start the operator
         run: |
@@ -173,7 +173,7 @@ jobs:
             sed -i "s/# kubernetes.operator.leader-election.lease-name: flink-operator-lease/kubernetes.operator.leader-election.lease-name: flink-operator-lease/" helm/flink-kubernetes-operator/conf/flink-conf.yaml
             sed -i "s/replicas: 1/replicas: 2/" helm/flink-kubernetes-operator/values.yaml
           fi
-          helm --debug install flink-kubernetes-operator -n ${{ matrix.namespace }} helm/flink-kubernetes-operator --set image.repository=flink-kubernetes-operator --set image.tag=ci-${{ matrix.java-version }}-latest ${{ matrix.extraArgs }}
+          helm --debug install flink-kubernetes-operator -n ${{ matrix.namespace }} helm/flink-kubernetes-operator --set image.repository=flink-kubernetes-operator --set image.tag=ci-latest ${{ matrix.extraArgs }}
           kubectl wait --for=condition=Available --timeout=120s -n ${{ matrix.namespace }} deploy/flink-kubernetes-operator
           kubectl get pods -n ${{ matrix.namespace }}
       - name: Run Flink e2e tests