fix(aspects): "localAspects is not iterable" error

[sumupitchayan]

Closes #32470

Reason for this change

Some customers have reported seeing the error TypeError: localAspects is not iterable upon upgrading to CDK v2.172.0 (this is when the Priority-ordered aspects feature was released). This is likely caused by customers having dependencies on third-party constructs/libraries which are using outdated versions (< 2.172.0) of CDK. The problem more specifically is that the Aspects.applied function was added in v2.172.0, and the new invokeAspects function calls this function on all nodes in the tree.

Description of changes

Created a workaround for customers. Added the getAspectApplications function in synthesis.ts - this function creates AspectApplication objects from Aspects.all if Aspects.applied does not exist.

Describe any new or updated permissions being added

None.

Description of how you validated changes

New unit test in aspect.test.ts with a monkey patched Aspects.applied function.

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

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.54%. Comparing base (0150854) to head (c98f770).
Report is 1 commits behind head on main.

Additional details and impacted files

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##             main   #32647   +/-   ##
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  Coverage   80.54%   80.54%           
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  Files         106      106           
  Lines        6954     6954           
  Branches     1287     1287           
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  Hits         5601     5601           
  Misses       1175     1175           
  Partials      178      178           

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suite.unit	80.54% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	80.54% <ø> (ø)

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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).

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: c98f770
• Result: SUCCEEDED
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