feat: add loadBalancerClass for proxy and pulsar-manager

[lenglet-k]

Fixes #545

Motivation

Add loadBalancerClass for use metallb loadbalancer service on private kubernetes cluster

Modifications

Add loadbalancerClass on proxy-service.yaml and pulsar-manager-service.yaml

Verifying this change

• Make sure that the change passes the CI checks.

[lhotari]

LGTM, small typo fixes suggested

[lhotari]

k8s docs for loadBalancerClass: https://kubernetes.io/docs/concepts/services-networking/service/#load-balancer-class

[lenglet-k]

Hello, @lhotari thanks for fix. Possible to have a 3.7.1 with this improvement ?

[lhotari]

Hello, @lhotari thanks for fix. Possible to have a 3.7.1 with this improvement ?

@lenglet-k There's some overhead in the Apache release process so I'd rather batch more changes in the next release. In Apache Software Foundation (ASF), there are some policies around releases and that's why it cannot happen purely by automation and it requires release voting.
On your end, it's worth using a fork of the helm chart for your deployments so that you don't have to wait for upstream releases of the Apache Pulsar helm chart in order to start using some improvements.