Add support for shareProcessNamespace to the helm chart

[thomasbruggink]

Hi,

I'm trying to setup a side-car to write the NGINX access log to an internal log processor and would like to signal the NGINX process that it needs to re-open the file. With yml this can be done by adding shareProcessNamespace: true which allows a log rotate side-car to signal NGINX to re-open the logs files.
It seems this option is missing in the helm chart deploymeny.

Is it possible to add this as a configuration option?

A similar issue was reported before but it went stale: #7108

[k8s-ci-robot]

@thomasbruggink: This issue is currently awaiting triage.

If Ingress contributors determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.