Add bk rack info setting in cluster metadata setup

[wangjialing218]

Motivation

Currently we have only Admin API Bookies.updateBookieRackInfo() to config rack info. If we want to setup up a pulsar cluster with some rack info config, we need to start brokers first, wait for brokers start, then call Admin API. It's better to provide a way to do the config before start brokers to make the deployment more easier.

Modifications

Add rack info setting in cluster metadata setup like:

bin/pulsar initialize-cluster-metadata \
                --cluster clusterName \
                --zookeeper 127.0.0.1:2181 \
                --configuration-store 127.0.0.1:2181 \
                --web-service-url http://127.0.0.1:8080 \
                --broker-service-url pulsar://127.0.0.1:6650 \
                --rack-info address:127.0.0.1:3181,rack:/rack1;address:127.0.0.2:3181,rack:/rack2

Verifying this change

This change added tests and can be verified as follows: ClusterMetadataSetupTest.testSetupWithBkRackInfo

Documentation

• [x] doc-required (Your PR needs to update docs and you will update later)

[wangjialing218]

/pulsarbot run-failure-checks

[wangjialing218]

/pulsarbot run-failure-checks

[github-actions[bot]]

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