feat(autoscaling): add an option to run validation when migrating to launch template

[jungseoklee]

This patch add an option to run validation checking whether UpdatePolicy is specified when migrating to launch template.

Issue # (if applicable)

Closes #34283.

Reason for this change

To make migration to Launch Template safer.

Description of changes

This change introduces an option flag to check whether or not UpdatePolicy is specified. As enforcing UpdatePolicy, existing EC2 instances based on Launch Configuration are terminated, and new EC2 instances based on Launch Template are launched, which always references IAM instance profile defined by Launch Template.

Describe any new or updated permissions being added

N/A

Description of how you validated changes

Added an unit test.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

The pull request linter fails with the following errors:

❌ Features must contain a change to a README file.
❌ Features must contain a change to an integration test file and the resulting snapshot.

If you believe this pull request should receive an exemption, please comment and provide a justification. A comment requesting an exemption should contain the text Exemption Request. Additionally, if clarification is needed, add Clarification Request to a comment.

[jungseoklee]

IMHO, failures from "Codecov / collect (pull_request)" and "Security Guardian / non-security-guardian (pull_request)" are unrelated.

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: d436e03
• Result: SUCCEEDED
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[aws-cdk-automation]

This PR has been in the CHANGES REQUESTED state for 3 weeks, and looks abandoned. Note that PRs with failing linting check or builds are not reviewed, please ensure your build is passing

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[aws-cdk-automation]

This PR has been deemed to be abandoned, and will be automatically closed. Please create a new PR for these changes if you think this decision has been made in error.

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