feat(ec2): network interface definitions for launch templates

[pasiorovuo]

This PR implements basic functionality for defining network interfaces as part of Launch Template.

Issue # (if applicable)

Fixes #14494

Reason for this change

Current Launch Template L2 is missing the ability to define multiple interfaces, their subnets etc. This functionality is required in advanced scenarios where instances need multiple public IP addresses or need to be multi-homed etc.

Description of changes

Multiple new types have been introduced in packages/aws-cdk-lib/aws-ec2/lib/launch-template.ts. Many of them are just renamed extends of the ec2-generated types. This made sense as the Cloudformation type definition is suitable, but I'm a bit uncertain if this violates the design requirement Do not “leak” the details or types of the CFN layer when defining your construct API.

Main type is NetworkInterface which defines the attributes for the interfaces. Additional changes are in LaunchTemplate constructor to accommodate the new functionality.

README has been updated to include a simple usage example.

Description of how you validated changes

A single test has been added. I have also verified the implementation by creating stacks in different configurations and deployed them. There too many combinations to check them all, so only a subset has been tested, unfortunately.

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 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.

[pasiorovuo]

I do not know what the failing check is about.

[aws-cdk-automation]

This PR cannot be merged because it has conflicts. Please resolve them. The PR will be considered stale and closed if it remains in an unmergeable state.

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 8be843b
• Result: SUCCEEDED
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