Disable ingress per default

[Zelldon]

Deploying ingress resource per default doesn't make much sense, since not everyone has an ingress controller deployed. We decided to disable it per default.

Like its done in other charts:

Grafana
https://github.com/grafana/helm-charts/blob/main/charts/grafana/values.yaml#L183-L184

Kibana:
https://github.com/elastic/helm-charts/blob/main/kibana/values.yaml#L142-L143

Elasticsearch
https://github.com/elastic/helm-charts/blob/main/elasticsearch/values.yaml#L250-L251

BTW @menski I saw that the previous full chart deployed an ingress nginx controller https://github.com/camunda-community-hub/camunda-cloud-helm/blob/main/charts/zeebe-full-helm/Chart.yaml#L19-L21 but tbh I'm not sure whether we really want that. Plus it didn't work #146

related to #124

[Sijoma]

I approve! Who wants to deploy an nginx bundled with a helm-chart anyway? :D

@Zelldon have you found how I get on the list of reviewers?

[menski]

As we discussed before, I think it should be optional as people have to do other stuff before it works, and no I don't think we should deploy an ingress controller with our helm charts, this is out of scope for me