fix(cdk): remove source-map-support from typescript init templates

[mrgrain]

Issue

Closes #20754
Closes #30231

Reason for this change

This package is no longer needed and not recommended for users.

Description of changes

Remove the package from package.json and sample code.

Description of how you validated changes

Tested locally.

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]

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.14%. Comparing base (f8415c0) to head (e944033).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #32113   +/-   ##
=======================================
  Coverage   77.14%   77.14%           
=======================================
  Files         105      105           
  Lines        7163     7163           
  Branches     1311     1311           
=======================================
  Hits         5526     5526           
  Misses       1457     1457           
  Partials      180      180           

Flag	Coverage Δ
suite.unit	77.14% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	77.14% <ø> (ø)

[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: e944033
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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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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