k8s-stack: Use many notifiers for vmalert

[zvlb]

Chart version: 0.12.*

I want to use 2 notifiers for vmalert. I try many variants:

1. Classic:

  vmalert:
    spec:
       notitfiers:
        - url: "alertnamager1"
        - url: "alertnamager2"

But after helm install in CR vmalert I see only 1 notifier.

2. With ExtraArgs:
3. Classic:

  vmalert:
    spec:
       notitfier:
         url: "alertnamager1"
       extraArgs:
         notifier.url: "alertnamager2"

After helm install in CR vmalert I see something like:

  spec:
    extraArgs:
      notifier.url: "alertnamager2"
    notitfier:
      url: "alertnamager1"

but in finish Deployment ib args exist only alertnamager2

---

I was able to set it up to make it work& But I think its not obvious

  vmalert:
    spec:
       extraArgs:
         notifier.url: "alertnamager1,alertnamager2"

I think the problem here