[loki-distributed] Update service templates as per Grafana documentation

[Sheikh-Abubaker]

Fixes #2818

[zanhsieh]

@zalegrala Little help on this PR please.

[zanhsieh]

@jkroepke Can you review this PR please?

[jkroepke]

I have no idea here, and I don't know if its safe to omit 9096.

appProtocol is introduced in Kubernetes 1.20, the minimum Kubernetes version should be raised and defined in Chart.yaml

In general, I asking myself why this chart is still maintained. I would recommend to deprecated (and remove) this chart, since loki maintainers itself maintains the loki chart in the own repository.

[Sheikh-Abubaker]

@zanhsieh This is a very old PR of mine, meanwhile I didn't get much time looking back at this PR, I think for now I'd convert it into a draft and when I am sure of all the changes I'll reopen it.

[Sheikh-Abubaker]

In general, I asking myself why this chart is still maintained. I would recommend to deprecated (and remove) this chart, since loki maintainers itself maintains the loki chart in the own repository.

I'm also thinking the same!