Issue Description: In current implementation, executor image name would read from configmap which would not work with CPaaS on-boarding.

Executor image name should be wired into operator bundle at time of bundle creation.
MK doing same.

Managed Kafka is using env variables which are bind to the deployment of operator. https://gitlab.cee.redhat.com/mk-ci-cd/rhosak-pipeline-configs/-/blob/rhosak-0.1-rhel-8/distgit/containers/rhosak-kas-strimzi-operator-bundle/src/templates/strimzi-cluster-operator.deployment.yaml#L65

Value of these env are update dynamically in CPaaS pipeline. https://gitlab.cee.redhat.com/mk-ci-cd/rhosak-pipeline-configs/-/blob/rhosak-0.1-rhel-8/distgit/containers/rhosak-kas-strimzi-operator-bundle/render_templates#L84

At last image name from these envs are read in code while creating k8s resources. https://gitlab.cee.redhat.com/mk-ci-cd/strimzi-operator/-/blob/mk-master/cluster-operator/src/main/java/io/strimzi/operator/cluster/model/KafkaExporter.java#L128

Acceptance Criteria: executor image name should be read from env which is injected at time of compilation.