Add support for creating Scheduled Scaling rules using eksctl CLI

[hassaanakram]

Description

AWS EKS NodeGroups are bound to Autoscaling groups that support AWS::AutoScaling::ScheduledAction which allows the user to create NodeGroup scaling rules for predictable load changes. Currently, eksctl does not support the creation of ScheduledAction. This PR introduces the Scheduled Scaling feature.

Closes #5524

Method

The AWS::AutoScaling::ScheduledAction can be created after an ASG is created therefore this has been added a new sub task in Unmanaged and Managed NodeGroup creation tasks.

Note

This is a draft PR and does not contain updates to test files.

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes
• (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[hassaanakram]

Hi @Himangini
can i continue working on this? Can you please have a look at my comment in the attached issue

[TiberiuGC]

Hi @hassaanakram

I like your approach using a new stack. You may carry on the work whenever you find convenient. Only comment is I think we also need to delete these stacks when deleting nodegroups.