feat(ec2): support for Cloud Wan Core Network routes

[nburtsev]

Reason for this change

Routing through Cloud WAN Core Network

Description of changes

Added Core Network to RouterType enum, updated typeToParameter function, updated tests.

Describe any new or updated permissions being added

None

Description of how you validated changes

Updated and ran the tests. C

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]

(This review is outdated)

[nburtsev]

Exemption Request
This PR adds additional element to existing Enum that's not mentioned in README, nor I believe this warrants updating integration tests.

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 6564838
• Result: SUCCEEDED
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[Abogical]

Thank you!

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

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