feat(docdb): throw ValidationErrors instead of untyped Errors

[kaizencc]

Issue # (if applicable)

Relates to #32569

Reason for this change

untyped Errors are not recommended

Description of changes

ValidationErrors everywhere

Describe any new or updated permissions being added

None

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

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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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.38%. Comparing base (6761f56) to head (a667892).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #33870   +/-   ##
=======================================
  Coverage   82.38%   82.38%           
=======================================
  Files         120      120           
  Lines        6938     6938           
  Branches     1170     1170           
=======================================
  Hits         5716     5716           
  Misses       1119     1119           
  Partials      103      103           

Flag	Coverage Δ
suite.unit	82.38% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	∅ <ø> (∅)
packages/aws-cdk-lib/core	82.38% <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).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: a667892
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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