feat(ecs-patterns): allow custom ephemeral storage for ECS Fargate services

[daixi98]

Issue # (if applicable)

Closes #18105.

Reason for this change

In April 2021, Fargate added support for requesting additional ephemeral storage.

Support for this feature has been added to the aws-ecs package, but is still not supported by the aws-ecs-patterns package.

Description of changes

This code change adds an optional field ephemeralStorageGiB in packages/aws-cdk-lib/aws-ecs-patterns/lib/base/fargate-service-base.ts, after other fields like cpu and memoryLimitMiB.

Description of how you validated changes

Added unit tests and new integration tests.
Created a simple CDK application with the new constructs, and verified that it synthesized and deployed correctly.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

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 has failed. See the aws-cdk-automation comment below for failure reasons. 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.

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[aaythapa]

lgtm, just one question

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 5e4d58c
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository