Support multiple offering GroupBalancers to coordinator

[ekeric13]

When creating a consumer you specify what balancer strategy to use:

https://pkg.go.dev/github.com/Shopify/sarama#Config.Consumer

In other clients such a parameter is an array of balancers in case other consumers don't implement one of the balancers:
https://pkg.go.dev/github.com/segmentio/kafka-go#ConsumerGroupConfig

Is there a way to do this in sarama? If not this would be a good feature

[napallday]

We also need this feature. And I create a pull request in #2339.

[dnwe]

Fixed by #2339 (thanks Jacob-bzx) — will be included in the next release version