feat(assertions): throw typed errors

[mrgrain]

Issue

Relates to #32569

Description of changes

Introduces a new AssertionError and uses it.

Describe any new or updated permissions being added

n/a

Description of how you validated changes

Existing tests. Exemptions granted as this is a refactor of existing code.

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]

(This review is outdated)

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.90%. Comparing base (47a3f90) to head (dbdd532).

❌ Your patch check has failed because the patch coverage (33.33%) is below the target coverage (95.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #33382      +/-   ##
==========================================
- Coverage   80.91%   80.90%   -0.02%     
==========================================
  Files         236      236              
  Lines       14258    14261       +3     
  Branches     2492     2493       +1     
==========================================
+ Hits        11537    11538       +1     
- Misses       2436     2438       +2     
  Partials      285      285              

Flag	Coverage Δ
suite.unit	80.90% <33.33%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
packages/aws-cdk	79.74% <ø> (ø)
packages/aws-cdk-lib/core	82.16% <33.33%> (-0.03%)	⬇️

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

[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: dbdd532
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[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).

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