feat(core): add support for AccountIdFromAlias #27642

[YYang30]

reason for this change:

• Cloud Formation team introduced the support for referencing an AWS account via a new intrinsic function Fn::AccountIdFromAlias. This function can be used in cloud formation templates to reference another account(s) using a conventional alias string. We can get rid of hardcoding AWS account ID(s) in cloud formation templates. So it's helpful for automating region build process.
• However, cfn-parse in the aws-cdk/core module has not yet added the support for this new CFN function, as a result of which, cfn-parse would fail to recognize this function as a valid/supported CFN function.

fix #27642

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[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.

[YYang30]

Exemption Request

• (justification for requesting exemption on integration test) The test does not require a stack deployment. cfn-parse is an internal helper class for validating a cloud formation template. Please feel free to suggest. Will appreciate any guidance/suggestion and be happy to adopt them.

• (need clarification on doc/readme change). Checked this readme file for aws-cdk-lib/core module link. Is this the right file/place to use?

[aws-cdk-automation]

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• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 1bd4042
• Result: SUCCEEDED
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[YYang30]

Exemption Request

(justification for requesting exemption on integration test) The test does not require a stack deployment. cfn-parse is an internal helper class for validating a cloud formation template. Please feel free to suggest. Will appreciate any guidance/suggestion and be happy to adopt them.

(need clarification on doc/readme change). Checked this readme file for aws-cdk-lib/core module link. Is this the right file/place to use?

[scanlonp]

This change looks great!

On the exemption, I do not think you need either an integ test or a readme update.

However, I could not find any documentation on the Fn::AccountIdFromAlias cloudformation function. For example it is not here https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference.html. Can you provide some documentation on this function?

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