Move bookkeeper metadata initialization to it's own job

[Lari Hotari]

Currently
bookkeeper shell metaformat --nonInteractive is called every time a bookie is started:

pulsar-helm-chart/helm-chart-sources/pulsar/templates/bookkeeper/bookkeeper-statefulset.yaml

Lines 132 to 142 in 524d796

       # This initContainer will make sure that the bookkeeper 
       # metadata is in zookeeper 
       - name: pulsar-bookkeeper-metaformat 
         image: "{{ .Values.image.bookkeeper.repository }}:{{ .Values.image.bookkeeper.tag }}" 
         imagePullPolicy: {{ .Values.image.bookkeeper.pullPolicy }} 
         command: ["sh", "-c"] 
         args: 
         - > 
           bin/apply-config-from-env.py conf/bookkeeper.conf && 
           bin/apply-config-from-env.py conf/bkenv.sh && 
           bin/bookkeeper shell metaformat --nonInteractive || true; 

bookkeeper shell metaformat command is deprecated since 4.7.0
https://bookkeeper.apache.org/docs/latest/reference/cli/#bookkeeper-shell-metaformat

This command is deprecated since 4.7.0, in favor of using initnewcluster for initializing a new cluster and nukeexistingcluster for nuking an existing cluster.

Consider moving the bookkeeper metadata initialization to it's own job