Support ILM settings for elasticsearch8 in /templates/conf/fluent.conf.erb

[adelca]

Is your feature request related to a problem? Please describe.

Hi, can you support ILM settings for elasticsearch8?
We recently upgraded to elasticsearch8.11 and did so with fluentd-daemonset... going from fluent/fluentd-kubernetes-daemonset:v1.16-debian-elasticsearch7-1 to fluent/fluentd-kubernetes-daemonset:v1.16-debian-elasticsearch8-1

ILM settings are ignored, I can see there is an if statement for elasticsearch7 here: https://github.com/fluent/fluentd-kubernetes-daemonset/blob/master/templates/conf/fluent.conf.erb#L46

Describe the solution you'd like

Support ILM settings for elasticsearch8 image.
Maybe add elasticsearch8 to this line? https://github.com/fluent/fluentd-kubernetes-daemonset/blob/master/templates/conf/fluent.conf.erb#L46

Describe alternatives you've considered

Ive been playing around with extra.conf

Additional context

No response

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