Deprecate https://github.com/HENNGE/terraform-aws-autoscaling-mixed-instances

[FurqanHabibi]

• check other repo that are still using it
• ask them to migrate to upstream https://github.com/terraform-aws-modules/terraform-aws-autoscaling

Waiting on:

• Remove mention of autoscaling-mixed-instances in readme terraform-aws-ecs#34
• https://github.com/HENNGE/gross/pull/484

[hanscg]

@FurqanHabibi
Just checking, is this done?

[FurqanHabibi]

@hanscg Let me confirm 🙏

[FurqanHabibi]

@hanscg Checked and confirmed only one usage left, but the repo is already deprecated, so it should be fine.
https://github.com/HENNGE/shoboview/blob/demodesu/tf/stack/shoboview/asg.tf

[hanscg]

@FurqanHabibi
Thank you! Should we archive this repo then? cc: @michaelaw320