feat: Tags passed into worker groups override tags from var.tags for Autoscaling groups

[huddy]

PR o'clock

Description

This PR brings an enhancement that allows tags that are passed into var.worker_groups_launch_template or var.worker_groups to override tags passed in via var.tags for ASGs only.

This relates to #1091

The main use case for this is where a tag is required everywhere apart from worker nodes. In this case we can pass the tag in via var.tags, but then pass it in with the worker template and set propagate_at_launch to false.

In order to ensure that the override only happens where it needs to I had to move the asg_tags for expression from locals.tf to be in the context of each worker template.

This way we don't incorrectly override tags where we haven't actually overwritten them.

I wasn't sure if you would class this as an improvement or feature, but I went with improvement, happy to change it to a "feature".

Checklist

• CI tests are passing
• README.md has been updated after any changes to variables and outputs. See https://github.com/terraform-aws-modules/terraform-aws-eks/#doc-generation

[huddy]

I've just merged latest master too

[barryib]

Thanks @huddy for your contribution. I'll make a new release as soon as fargate PR is merged.

[huddy]

Thanks for the very quick turnaround @barryib and once again thanks to you and other maintainers for awesome work.

[github-actions]

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