parameterized the tagging of tail plugin

[harshvora10101]

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes 1 :
Parameterising the tag for tail plugin. Overriding this value will help changing the tags according to the requirements.

[benjaminhuo]

@harshvora10101 Thanks for the PR. You'll need to sign your commit by:

git commit -s --amend
git push -f

[benjaminhuo]

It's not enough to modify tag for tail input only.
For example, it's used by other plugins like filter and output:
https://github.com/fluent/fluent-operator/blob/master/charts/fluent-operator/templates/fluentbit-clusterfilter-kubernetes.yaml#L12

https://github.com/fluent/fluent-operator/blob/master/charts/fluent-operator/templates/fluentbit-clusterfilter-containerd.yaml

https://github.com/fluent/fluent-operator/blob/master/charts/fluent-operator/templates/fluentbit-output-opensearch.yaml#L12

[harshvora10101]

got it.
I will update this PR with the wider plugin lists.

[harshvora10101]

and I will also sign the commits.

[harshvora10101]

@benjaminhuo Added the required changes.

[benjaminhuo]

There are output plugins affected too https://github.com/fluent/fluent-operator/blob/master/charts/fluent-operator/templates/fluentbit-output-opensearch.yaml#L12

Fluent Operator is used to deploy FluentBit to collect k8s logs, so kube.* is ok.
I wonder what's the reason for changing this tag to others.

cc @wanjunlei

[harshvora10101]

@benjaminhuo

With this change, we are not changing the tag (Just making the code generalized). So I doubt that output plugins will be affected.

There are use cases where we need multiple tail plugins for different applications with different tags. So a hardcoded tag is hard to change.

[harshvora10101]

To be precise
There are multiple tail plugins used for kubernetes with xyz.kube.* and abc.kube.* etc.

[wenchajun]

https://github.com/fluent/fluent-operator/blob/master/charts/fluent-operator/templates/fluentbit-output-elasticsearch.yaml#L12 Shouldn't this situation be dealt with as well?