feat(cognito): throw ValidationError instead of untyped errors

[mazyu36]

Issue # (if applicable)

aws-cognito for #32569

Description of changes

ValidationErrors everywhere

Describe any new or updated permissions being added

n/a

Description of how you validated changes

Existing tests. Exemptions granted as this is basically 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

[mazyu36]

Exemption Request: This PR only replace Error to ValidationError.

[mazyu36]

To maintainers:
I've created this PR after receiving a suggestion to replace ValidationError in aws-cognito.
#33164 (comment)

If there are any issues, feel free to close this PR :)

[aws-cdk-automation]

(This review is outdated)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.79%. Comparing base (988043e) to head (19af352).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #33170   +/-   ##
=======================================
  Coverage   80.79%   80.79%           
=======================================
  Files         232      232           
  Lines       14110    14110           
  Branches     2453     2453           
=======================================
  Hits        11400    11400           
  Misses       2430     2430           
  Partials      280      280           

Flag	Coverage Δ
suite.unit	80.79% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	79.53% <ø> (ø)
packages/aws-cdk-lib/core	82.17% <ø> (ø)

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 19af352
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[lpizzinidev]

👍 Please fix the typo in the title (intsead) and surround ValidationError with backticks

[mrgrain]

Thank you, really appreciate this!

✅ 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).

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