IT-2 refactor: add launch template to eks node group

[hugorut]

Update production node group to include a launch template for new nodes.

[github-actions]

💰 Infracost estimate: monthly cost will decrease by $280 (-11%) 📉

Project	Previous	New	Diff
infra_aws	$1,117	$836	-$280.32 (-25%)
All projects	$2,446	$2,166	-$280.32 (-11%)

2 projects have no cost estimate changes.

Infracost output

Project: infra_aws

~ aws_instance.web_app
  -$280 ($680 → $400)

    ~ Instance usage (Linux/UNIX, on-demand, m5.4xlarge → m5.2xlarge)
      -$280 ($561 → $280)

Monthly cost change for infra_aws
Amount:  -$280 ($1,117 → $836)
Percent: -25%

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The following projects have no cost estimate changes: infra_azure (Module path: azure), infra_google (Module path: google)
Run the following command to see their breakdown: infracost breakdown --path=/path/to/code

──────────────────────────────────
Key: ~ changed, + added, - removed

6 cloud resources were detected:
∙ 6 were estimated, all of which include usage-based costs, see https://infracost.io/usage-file

This comment will be updated when the cost estimate changes.

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