feat(mixin-preview): expose EnabledEnhacedContainerInsights as a pu…

[0xdsqr]

Issue # (if applicable)

Na, live discussion.

Reason for this change

Add containerInsights: enhanced support for ecs clusters through a new EnableEnhancedContainerInsights mixin.

Description of changes

Created a new EnableEnhancedContainerInsights mixin to be leveraged by L1 or L2 ecs cluster constructs which enables enhanced container insights on a ecs cluster, per the specs outlined in the docs.

new ecs.CfnCluster(stack, 'L1Cluster', { clusterName: "test" })
  .with(new EnableEnhancedContainerInsights());

new ecs.Cluster(stack, 'L2Cluster', { vpc, clusterName: "test", }).
  with(new EnableEnhancedContainerInsights());

The docs note "Allowed values: containerInsights" as the only allowed key for ClusterSettings. This means we have no need for to find the key index, etc, a simply drop in replacement will do.

Description of how you validated changes

Unit and Integration tests.

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.

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.

✅ A exemption request has been requested. Please wait for a maintainer's review.

[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
Please try merge from main to avoid findings unrelated to the PR.

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	Tests	Passed ✅	Skipped	Failed
Security Guardian Results	48 ran	48 passed

Test	Result
No test annotations available

• View Security Guardian Results

[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
Please try merge from main to avoid findings unrelated to the PR.

---

	Tests	Passed ✅	Skipped	Failed
Security Guardian Results with resolved templates	48 ran	48 passed

Test	Result
No test annotations available

• View Security Guardian Results with resolved templates

[0xdsqr]

Exemption Request: Experimental Feature preview package

[0xdsqr]

cc @mrgrain for pr-linter/exempt-readme label maybe?