Allow enable-access-log annotation to set 'access_log on'

[vanny96]

As a kubernetes cluster administrator, I'd like to set the default access_log for the ingresses to off (achieving this by using disable-access-log on the ConfigMap).
This works great, but as of right now there is no way to turn on access_log on demand for specific environments. I would have assumed that using nginx.ingress.kubernetes.io/enable-access-log: "true" would allow to set the access_log back to on, but by looking at the nginx.tmpl it looks like this annotation only takes effect when the annotation is set to false.

Would it be possible to change enable-access-log such as:

• true: sets access_log on
• false: sets access_log off
• unset: sets nothing, keeps parent behaviour

[k8s-ci-robot]

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.

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[github-actions]

This is stale, but we won't close it automatically, just bare in mind the maintainers may be busy with other tasks and will reach your issue ASAP. If you have any question or request to prioritize this, please reach #ingress-nginx-dev on Kubernetes Slack.